old man zuko time travels and becomes his own grandfather (ilah, azulon's wife, has already passed)
raising iroh is surprisingly easy
raising ozai.
Ozai isn't, strictly speaking, a bad child. He's driven and a talented Firebender. He is obedient and respectful towards his elders and superiors. He has a Prince's arrogance toward his inferiors, but that's not exactly something Zuko can correct him for. Not outright, anyways.
So.
He tries to set up lessons for Ozai. For one such lesson, he orders a hunting competition between the princes. He staffs Ozai's hunting party with skilled, educated commoners and purposefully gets them lost in bad weather. But Ozai doesn't come back from his ordeal with a newfound appreciation for the lower classes, or even the men who were with him. No, Ozai comes back and stares at Iroh's prize catch.
Zuko isn't stupid. He immediately declares the contest meaningless and focuses on celebrating the miraculous return of his beloved son. Ozai grinds his teeth as Iroh toasts him.
Ozai hates pity.
Holy shit
