You seriously have issues, dude. First of all, Jayce is a pretty tight guy. He RARELY kicks/bans people, only if you're being a moron. I'm guessing that's why you got banned? :)
Secondly, it's his server. He does have all the authority in HIS server.
And he isn't afraid to give out admin, I have it. And so does tons of other people in his server.
So please, don't open your mouth to slam someone until you have an actual reason to.