It was an interesting detail to take off his crown, THEN jump, as if saying I’m not fit to lead, I leave.
Could you imagine having to face Darth Cersei after going against her? I may have jumped as well!
It was more like: "My mother killed my wife, killed my religion, killed my people, and SHE will end up ruling me. F**K this. I'll do something that she can't control and will HURT her as much as she did me".
I told my wife when he was watching the town go green.....that "If it was me, I'd just jump. I won't have my Mom telling me what to do".....and then he jumped. LOL