Because he demolished teams in a show boaty fashion. It's bad enough watching your team lose. But then you have a guy dancing on your corpse and taking sideline photos, I can understand why that would get under people's skin.Then why so much hate for him this season if he supposedly matured and learned? Seems that the hate was coming from fans of teams that are not even rivals of the Panthers. It also seemed to stem from his on field actions and not conforming to QB norms (whatever that is).
I don't care about the celebrations and all that. I'm all for it. If you can't stop him then you'll have to deal with it. Now that he's on the otherside of it, he's come off like a child.