You focus so much on those titles. On what you are. But it isn't what you are that makes you who you are. It's what you do. What have you done, Zuko, Crown Prince of the Fire Nation and heir to throne? Fight? Yell? Burn a house down? What do those actions make you? Is that who you want to be?

[He didn't back down. He didn't seem intimidated or even at all to care about the threat and titles being thrown around. Just quietly asserting that he was in control of the encounter and there was nothing Zuko could do about it.]

That's what's bothering you right now. You don't know who you are and everything you do feels wrong.