I think some blame definitely can be thrown Jason Garrett's way today. When you're up 27-3, the main thing you need to do is protect the football and not turn the ball over.
It doesn't matter if it's Tom Brady playing QB, there's no reason to be throwing the ball down the field when you're up three scores. Run the ball, play dink and dunk football, and if you punt, you punt. Your defense is playing lights out, and on top of that even if you dink and dunk your way into FG position, you can still extend your lead with FGs.
Tony can't make those throws, obviously, but as the head coach/offensive coordinator you have to know not to put your QB in that kind of position. We should have went into big/2TE sets and pounded the ball. When the Lions then decided to put 8 in the box, you go play action and go over the top like we did to Laurent Robinson earlier in the game.
A punt is 300x better than a pick six. Two punts is 1000x better than back to back pick sixes.
I believe in what Garrett is doing from a leadership and culture standpoint, but the game-planning and adjustment/play-calling has been somewhat headscratching for two weeks now.