1) asking to not live in the dorm when all the other players in his situation are required to, and then quitting the team when he didn't get his way is him quitting due to not getting special treatment. It's literally the definition of him quitting for not getting special treatment.
2) for being the most hyped high school player in recent memory, he averaged 4 yards per carry and was outplayed by a former redshirt walkon. I would call that underachieving.
3) he resides in Nebraska, does he not?
4) Not worth responding to.
Notice I haven't touched on his other foibles that have been alluded to (drug and alcohol use, poor behavior in class, etc.) I suppose I could to really blow you out of the water in this argument. But if you want to keep rooting for a Hawkeye traitor, be my guest.