He is an arrogant idiot, who thinks he is way better than he will ever be ?
This, have you been hiding under a massive rock jrwagh?
He has a half decent win against Nog who had a staff infection and looked like he was fed 10 sleeping pills before he went in the octagon. His only other notable win was against Brock, surrounded in a little controversy and also against a guy that was 1-0 in his second ever MMA fight.
This coupled with the fact he thinks he can pretty much tool anybody, is why most people think he is an arrogant idiot.