My Little Hot Take on Aang's Toxicity
Generally, it's often said in the fandom that Zutara shippers believe Aang is toxic, so I'll (taking advantage of the fact that it's Wednesday) share my unsolicited opinion on the matter. If we interpret Aang's feelings for Katara as a puppy love, then Aang isn't toxic because he's a child, a child who doesn't understand romantic love, common obligations, reciprocity, or the idea of "let's try to support each other as equally as possible." In fact, at the age of 12, he even has the right not to feel full empathy or consequences. But if their relationship is supposed to be a serious love relationship, then yes, he is toxic. Because he doesn't even try to do the same emotional work, to be the support she needs. Not to mention the fact that he's constantly hitting on or being hit on by other girls and constantly lying to her.
Anyway i'm going now to look for how to adopt ficional character and raise him into finding other methods of copying than abandoning.