I've got a confession to make.
The reason why I personally like writing so much Leo angst is because of the stuff that comes afterwards. He goes through hell and suffers from it and his reward is having his brothers and friends shower him in love and affection because he honestly deserves it.
Like Leo in canon gives so much for his loved ones, he protects them and guides them when they're lost and does his best to be a good big brother and leader to his team. He showers them with love and supports them in their dreams and ambitions, is somewhat like a mother hen over them and is always the first one to believe in his family and believe in their skills. He's in a way his brothers number one fan and supporter.
And he does all of it without asking for anything in return.
He loves them and sacrifices himself for them without any hesitation, because he loves them more than life itself. And a lot of times I feel like that it's sometimes forgotten about, which is why whenever I write that good old Leonardo angst I always make sure he gets that sweet, sweet validation and affection that he deserves because it's honestly something he's more than earned from everything he does. He gets turtle snuggles and nuzzles and gets to have someone else help him for a change and gets to have a much needed rest.