He thinks he's a king. He grew up in Indonesia, and that's the pattern burned into his brain as a child.
This is why he bows to other kings. He idolizes them, and we despise them.
In every picture of zer0 showing how ugly his posterior is, the person(s) to whom he's bowing are laughing at him. He is a monumental, humiliated failure, and it's too dang bad that algor was right about there being "no controlling legal authority" that can rein in this abomination.