OK.... I suppose I need a caveat. First I'll concede a couple of the wins... Michigan St and Northwestern were pretty gritty. But they tend to be the exception, not the rule.... perhaps I should say when he faces pressure, he doesn't have any poise. Some of that needs to be blamed on the line.
50% of our opponents' points for the season are off turnovers and most of those are his.
Whoever coaches the guy, they need to teach him to take care of the ball, to learn to check down, to get out of the pocket quicker, to throw the ball away. Against bad teams he does this, but against good teams he can't.
Likewise, against the lesser teams, he does enough to overcome the mistakes he makes. In the big games, he doesn't.