People don't like him because:
1) He is too damn cocky!
2) He has absolutley no ground game. Submitted easily by both AA and Mir. When he gets taken down he looks like a little b****! Hahahaha so funny to see him kicking his legs as fast as he can and trying to get back to his feet. What a *****!
3) He said he wanted to fight Fedor like he could easily beat him. C'mon now, Sylvia would be submitted by arm-bar first 2 minutes of the fight without a doubt.
4) Sylvia's best talent is his size. His boxing is good, but everyone knows that he wins alot of his fights simply because he is bigger, not more skilled.
That's just why people don't like him. I really don't like Sylvia and would love to see him lose to Monson by RNC! However, I realize there is a good possibility that Sylvia wins.
That said.... Go Monson! Choke his ass out!