He's not ruined.... but a poor job by the coaching staff, bad playcalling, outdated philosophy, and the Wildcat almost ruined him. In other words, they came damn close.
But the bottom line is that regardless of all that, Henne would still tell you that he just flat out didn't play well enough... take away all the excuses, and he still just didn't perform.
Your quarterback HAS to be the leader, and it's awful damn hard to lead when you're not playing well. A proven player can still lead when he's not playing well, he knows he'll snap out of that slump eventually... more importantly, his teammates know he will.
However, that's not the case when you're trying to establish yourself in this league.
What he needs is a fresh start, in a system that gives him an equal opportunity to experience a little success as the rest of the quarterbacks in this league... even if it's only in practice. Once he starts practicing well, he'll gain some confidence. That confidence will help a player play well in games. Playing well in games will allow him to lead.... which is the quarterback's job.
Beware of your thoughts; they become words.
Beware of your words; they become actions.
Beware of your actions; they become habits.
Beware of your habits; they become character.
Beware of character; it becomes your destiny.
Bottom line is he has one more chance to get it right, but he needs a little help along the way. The coaching staff has one more chance to get that right...