You say "Fitz sucks, but our defense was even worse than him in the first half. Very few, if any QBs could have won those games with that defense."
Lets take a look.
Game 1 - Lost 48-28 to the Jets
At first, that 48 # looks like a lot. Until you consider that 24 of those points came off of Fitzpatrick turnovers. The defense gave up 24 points on their own. Thats not bad. HALF of the points in the game came off of Fitz turnovers. Think about that for a moment. I bet most decent QBs would have won this game.
Game 3 - Lost 52-28 to NE
Bad game by the defense. But 7 points came off fo Fitz turnovers. Would have been more if Gostkowski didnt miss a couple easy field goals. But either way, bad day by the D.
Game 4 - Lost 45-3 to SF
17 points off Fitz turnovers. Defense gave up 28 points by themselves. Fitz also overthrew some open WR's in this game.
Game 6 - Lost 35-34 to Tennessee
Fitz is the sole reason we lost this game. 14 points off of Fitz turnovers. This is a 35-21 Bills win without Fitz throwing that awful, terrible, retched INT and fumbling right into the arms of a Tennessee player.
So in at least 2 of the 4 first half losses, the Defense gave up 24 or less points on their own. Thats not that bad. Are they playing much better now? Sure. But MOST decent QB's would have won a couple of those early games. Lets not blame the defense.