Sucks, because we're going to have to start over @ QB *again*
But yeah, Mitch is a huge part of the problem. There's no scenario I can see where he suddenly develops consistently good decision-making and hits on all the throws he needs to. Looks great on a few plays, but it's just not enough to be a good QB in this league. Most guys can show "flashes." So what? That's not the definition of a great QB and there's no reason to believe it will progress further than that.
Combine that with Nagy's laughable playcalling in key situations, and you've got last night's joke of a performance. I know the defensive players won't say anything, and they shouldn't, but wasting great performances like that has to be frustrating as heck.
If you choose not to decide you still have made a choice.