GOAT parental figure in western animation and he did manage to redeem himself (taking out Zhao's men, allowing Katara to escape with Aang's body, retaking Ba Sing Se) but not without his problems.
First, why did he use dragon-style firebending to conquer the world?
Second, why did it take his son dying for him to realize what he was doing was wrong; wasn't he hurting EK families for decades like this?
Third, when he stopped his siege of Ba Sing Se, didn't he make all the FN sacrifices pointless and basically tell his nation that their kid's lives were not as important as his son's?
Fourth, depending on when he learned lighting redirection, why didn't he challenged Ozai for the throne? He could have stopped the war a lot earlier and prevented a lot of Azula's and Zuko's tramua from ever happening.
Fifth, why didn't him and his WL members take control of Aang and train him in a safe space instead of leaving his training to literal kids and almost getting himself killed multiple times.
Sixth, why was it bad for two grown brothers to fight (to the death) for the FN throne but ok for his underage niece and nephew to do so?
Seventh, if Zuko was as much as fuck up as he was in The Promise, The Search, and Smoke and Shadow, why didn't he serve as Zuko's regent until Zuko completed his interrupted crown prince education or, if that wasn't politically feasible, why didn't he offer more guidance and/or serve as an advisor?