When you’ve been abused by a parent like that dealing with anything afterwords is terrifying.
I can only imagine the emotions Zuko was feeling when he apologised to Iroh there.
^This is one of the reasons that I think going in to apologize to Iroh is one of the bravest things that Zuko’s ever done, because of how much it must have terrified him to do so (Iroh would never hurt Zuko like that, but that fear had to have been at the top of Zuko’s mind at this moment)
And why I love Iroh so, so much for being who he is.
I wish Iroh was a real person, so I could learn more from him and that shows how amazing the writers for this show are.