Helluva boss and Hazbin Hotel, to me, is all pretty visuals and songs, not that much interesting characters/story. Like Promare, but more cartoony.
Which unfortunately leads to the fanbase making up large parts of the personality, which... Egh, might lead to some unwanted places.
Alastor is supposed to be Aro/ace, guys— and as Aro myself, the idea that he wants to fuck Charlie, or Vaggie or Angel or whoever feels EXTREMELY erasing—
The visuals and songs are a big draw for audiences, but Vivzie did say in a stream that the show was supposed to be about the characters' relationships with each other. However, I don't think the show is going to be very character-focused, going off of what we've seen so far.
This is an area where we might have to agree to disagree. As an asexual who isn't aromantic, I don't have a problem seeing Alastor shipped with various characters. It doesn't bother me at all. There are aroace people in the fandom who ship him in all sorts of different pairings. It's not erasure to me because aro/ace is a spectrum. There are aroace people who get married and have children, who are demi, who don't feel romantic attraction but still want a relationship. I could actually see Alastor getting into a QPR, if the creator chose to go that route.
Everyone's experience is different, of course, and if you don't want to see Alastor in a relationship of any kind that's perfectly valid. But a million pieces of fanart are never going to erase a canon identity. And it definitely doesn't make our representation in Alastor any less real.
As for your second part, I'm not sure what's hard to believe about Hell being a hellhole. The anarchy and territorial warfare we see in Hell is the natural result of having too many people fighting over limited resources. There are likely few opportunities for advancement in careers (as is typical in caste systems), so sinners resort to fighting over land to make a name for themselves.
Hell doesn't seem to be in a state of complete anarchy, or else it would be a headache for Lucifer. There are probably some rules and consequences. But Lucifer clearly doesn't care about his subjects killing each other with angel weapons in endless territorial warfare as they fight for overlord positions or just more status. Maybe he even finds the fights entertaining. Hell doesn't seem to have been designed to maximize punishment. Instead, it's a place where terrible people are all dumped together and their punishment is having to deal with each other and be subject to their judgement.
Counterpoint: Maybe Lucifer established the idea of becoming an overlord through gaining territory so that the sinners would fight among themselves for land instead of fighting him.













