Well, I mean, the obsessively and angrily chasing Aang party definitely shouldn’t be emulated, but he’s got a very good character growth arc.

• He learns his worth as a person (and as a prince) doesn’t come from his abusive father, but intrinsically from his own self.
• He gains the insight and humility to admit he was wrong and seek forgiveness from the people he wronged
• He learns to empathize with other people, and that he is his strongest when he releases (and is no longer clouded by) his anger and fights for good.
• He learns to appreciate the people who love him (Iroh) instead of chasing after someone who doesn’t (his father).

The world would be a better place of everyone could learn the lessons that Zuko learned.