I agree. He really should be banned. Some of the things he have said include, "You can't be serious. They'll never join. I'd give up that idea if I were you.", "Get your facts right, Mr. Yolo man.", and "Correction: You, PowerfulMewtwo, a.k.a Mr. Yolo man, just said something stupid, especially when you agree with DerpyDoodle's dumb request.". That should be enough evidence.
What? You cannot be better off without me. I belong here! I'll have nowhere else to go if I get banned. Don't you know that I have feelings, too? And you know what? I admit it, I'm misunderstood. So please, I want to live.
You'll have a better chance of living if you change your attitude. You nitpick everything you find to possibly be wrong, which does not help anyone. Constructive criticism is good sometimes, what you do isn't.
So please, if you don't have anything constructive to say, don't say anything.
He's already gotten a warning for his rude comments, other then some immature behavior he isn't breaking any rules as shouldn't be banned. Just don't respond to him if you dislike him, if he breaks any more rules he will get more warnings which will result in a ban.