My friend really needs to dump this guy.
Are you serious about wanting them to break up?
I have known him for five year and no one hates him more than me.
I don't think it is nice to try to break up someone else's relationship. Even though you don't like the guy it doesn't mean that he doesn't treat her well. You should try talking to your friend about him and see what she says.
She can find someone better in no time.
You opinion about their relationship is, frankly, irrelevant. It is her decision to either stay with him or to leave him.