You can rarely see your own faults mirrored in somebody else, but you pick up on their faults really fast. It's also got to piss him off that the Jets got Mangini for no compensation whereas the Pats had to pay for him when he jumped. Different situations, but then again it's hard to see that when you're involved.
I can't believe the NFL forces these guys to dress like that. BB seriously looks like a homeless guy who lives around the corner from me...down to the frayed cuffs on that ratty sweatshirt. And Mangini looks like a fat character from a sitcom who's about to go down to the gym for the first time so he can lose some weight and get the cute girl he thinks is out of his league.