You only mentioned the QB, so you are in my view. That facts are it was a team loss and the entire offense needs to shoulder some blame. Not just the QB. Yes, the QB had a bad game but when the offense finally did make a first down the drive was killed by some moron getting a penalty.
The line not being able to make a 3 yard first down in two rush attempts early. This sets the stage for the OC losing confidence in the run game and starts calling more pass plays.
The best player on offense in Shady McCoy had only 5 rushing attempts all game and his rush average was 4.8 yards per carry. Shady should be seeing 25 touches a game. He is also the Bills best receiver catch percentage wise. Just lame!