I don't think he cares if you leave, want banned, etc. Honestly. He's an ass, yet you've just fed into his "power".
The site will never learn if/when/why people are leaving, as again, they do not give a shit. About you, about Joe Blow User 6, about anyone but themselves. You don't like the place, fuck it, up and leave. They'd question that more than your request for banning, which they in turn will turn it around and call you an attention whore crybaby. You know they will.
Another reason I don't think they care, he knows (as well as you), that you'll be back.