I've been reading your posts and in one of them you mentioned that Iroh in fact is very shady and Azula has every right to hate him, may you explain why?
Let me start off by saying that I actually really like Iroh as a character. I think he’s great and well-written. I think the fandom tends to gloss over his flaws and label him as “perfect”, which is not true. One of his greatest failings (aside from making two teenage siblings fight each other for the throne...or really not intervening at all where Ozai is concerned) is his treatment of Azula, and him saying “No, she’s crazy and needs to go down” and essentially writing her off when, if you compare Azula’s personality with Season 1 Zuko, they’re really not all that different. Azula, people tend to forget, is a 14 year old girl who was as much a subject of abuse as her brother. Zuko and Azula were essentially pitted against one another to both gain Ozai’s affection and, more importantly, avoid punishment. The only difference is that she was rewarded and praised by Ozai for her power and cruelty, while Zuko was punished for his “shortcomings”. Zuko’s entire storyline proved how important it is to have a good, guiding parental figure in one’s life, and it’s tragic that Azula didn’t have that.
Now, let’s talk about why Azula probably hated her Uncle.
1. She thinks he’s a failure and, worse than that, weak
And I don’t mean weakness in terms of his firebending skills. Let me explain - Fire Nation citizens are ingrained with Nationalistic pride and complete loyalty to the Fire Lord from a very young age. Iroh, once upon a time, was the heir to the Fire Nation’s throne and the favored son of the notoriously cruel Azulon. He laid a 600 day siege against Ba Sing Se during which his son, Lu Ten, was killed. This tragic event caused him to withdraw his troops, despite having breached the outer wall.
Upon his return home, his father dies under mysterious circumstances and decrees that Ozai will be the heir to the throne. Instead of contesting it, Iroh leaves the Fire Nation and ostensibly spends his time traveling the world, meeting with the Dragons, and getting in tune with the Spirit World. Doing so gives him the knowledge and wisdom to see the error of his ways, at which point he returns to the Fire Nation and serves as a General in the army.
Let’s look at this from the perspective of Azula, or really any other citizen of the Fire Nation. Their country waged a nearly 2-year long siege against the Earth Kingdom - and right when they make progress by breaking through the first wall, the Crown Prince gives up because his son died. Countless Fire Nation lives and resources were spent on this 600 day campaign, and they end up with nothing to show for it. If you look at the philosophy of Sozin, Azulon, and Ozai, they likely would have used the death of Lu Ten to galvanize the troops and double their efforts, in an attempt to exact revenge against the Earth Kingdom for daring to spill royal blood - and so that their sacrifices thus far would not have been in vain.
And then, not only does Iroh withdraw from Ba Sing Se, he also abandons his duties and his country completely. Iroh had a reputation as a fearsome Firebender and cunning strategist - and he just leaves. So now not only is he a failure, but he’s also a deserter, one who abandons his nation while it’s reeling from a humiliating defeat and the loss of its Sovereign, Azulon (who, by the way, ruled for about 80 years).
In Azula’s eyes, all of this amounts to weakness, and as we all know from how she was raised by Ozai, weakness is unacceptable.
2. She is parroting her father’s feelings of resentment
Given that Azula was the favored child of Ozai, it’s likely that she idolized her father and thought he was superior to her uncle, the Crown Prince (for the first few years of her life, at least, Iroh WAS the Crown Prince) and should have been the true heir to Azulon. We don’t see a whole lot of Ozai or his backstory/characterization, but it’s not unreasonable to assume that he, being many years younger than Iroh (it’s never officially stated, but Ozai is around 45 at the time of the show and Iroh appears to be in his late 60’s/early 70’s) had an inferiority complex growing up, and probably some form of sibling rivalry. After all, Iroh is already an adult by the time Ozai is born, and the Crown Prince, who has been groomed from birth to be Azulon’s heir. Ozai is an afterthought; an insurance policy, who at the very moment of Lu Ten’s birth, is outranked by an infant.
Ozai probably resented Iroh his entire life, so it is not unlikely that Azula would probably feel the same way.
3. He’s a traitor to the Fire Nation
Azula is a Nationalist and Ozai’s most loyal enforcer. Iroh’s a traitor, and as far as she knows, a corrupting influence to her brother, Zuko. She also probably thinks that he’s committing treason because (she doesn’t know any better) Iroh wants to be the rightful Fire Lord, and she is not going to stand for that.
4. He reminds her of her mother
Azula is used to being the golden child - a prodigious Firebender, the favored daughter of her father, representative of everything the model Fire Nation child should be. And yet, her own mother does not appear to love her. Her Uncle has stated distaste for her. She thinks she’s doing everything right - because according to Sozin and Ozai’s philosophies and the emphasis of power and loyalty to the Fire Nation - she is; so why do two of her own family members prefer Zuko, the “screw-up” of the family - to her?
It’s clear that Azula craves the love and adoration of others, but she doesn’t really understand it. I think as she grew older and saw more of the world and how people behaved toward her, she understood on some level that she was considered a “monster” and that people were afraid of her; but that’s how she was raised. Fear was power, and power was everything. And growing up, she was only ever positively reinforced for her ruthlessness and cunning by her father (of whom she is very much afraid, by the way...that is made perfectly clear in her attempts to bring Zuko home and also give him credit for allegedly killing the Avatar. Part of it is actually probably due to some level of affection she has for him, but part of it is definitely motivated by having someone else take the heat off of her in an abusive household) and she witnessed firsthand how perceived weakness was punished - so she did everything she could to achieve the ideal of perfection that Ozai, Azulon, and Sozin had proliferated. So she probably never really understood why her own mother and Iroh didn’t like her. And the fact that they both seemed to prefer Zuko, who she’s been taught to think she’s better than, would only further that resentment.
She thinks she can earn people’s affection by being a perfect Fire Nation soldier, because that’s what works with her father - and when it doesn’t work with Ursa or Iroh, two important adult family figures in her life - she doesn’t understand why and, even worse than that, it makes her feel inferior to Zuko.
5. My final point is purely speculative, but...He didn’t do anything to directly stop Ozai’s rise to power
In the years after the war, after recovering from her mental break and maybe rehabilitating to become an advisor to Zuko (let’s be totally honest, a Nation whose entire economy for the past 100 years has been built on war and imperialization is not going to have an easy transition into peace, especially when they are expected to give up their colonies and play nice with an equally corrupt government that was controlled by the Secret Police force which has no qualms about brainwashing its own citizens...also the new Fire Lord is a banished Prince who is the apprentice of the Disgraced Prince and who returned to defeat the pride of the Nation, Princess Azula, Ozai’s Chosen Heir and the Conqueror of Ba Sing Se), Azula’s going to be pretty pissed that her supposedly wise and worldly uncle did not intervene in her megalomaniacal and abusive father’s rise to power.
If my uncle, who never liked me, lost countless Fire Nation lives and resources in a battle that ended with him retreating, abandoned the Crown to go on a sightseeing tour of the world, returned and became a traitor to the nation by foiling the Admiral’s conquest of the Northern Water Tribe resulting in the loss of more Fire Nation lives, escaped from you multiple times and went on to become a tourist and small business owner in an enemy nation, turned your brother against you, did nothing to stop his own brother whom he knew was deeply abusive even after he came back after gaining all this supposed wisdom, and THEN also left you alone with your abusive father while taking your inferior brother under his wing and helping him become an extremely powerful bender who eventually defeats you with the help of a Water Tribe peasant...yeah, I’d be pretty pissed at him, too.
To be fair, she probably never would have willingly gone with them because they were basically just sent on a wild goose chase at that point...but he never even tried to help her.
Anyway, that’s why I think Azula hates Iroh and honestly, she has every right to hate him. He abandoned her Nation and wrote her off completely, so there’s no reason she wouldn’t do the same.