IMO the secondary reason the Packers lost was the Bills' excellent pass defense.
The only reason the Bills pass defense appeared to be "excellent" was because Rodgers didn't show up to the game and nobody could catch the ball. That wasn't because of anything the Bills did. Nelson burned his man and got open for what should have been touchdowns twice. One of those times Rodgers was asleep at the wheel and he threw an INT Cobb's way when he was wide open on the other side. The other time he just flat out dropped it. So as it stands, there should have been two more TDs on the scoreboard. And it's 100% Rodgers and Nelson's fault that didn't happen, because it was there for the taking.
If this game was the other way around I highly doubt you'd be calling the Packers pass defense "excellent." The talk would be all about how the defense got away with one because they caught the other QB on a bad day and the other team's receivers couldn't catch the ball -- how their QB missed guys who were wide open and how guys who were open dropped nearly everything they got their hands on.
The Bills pass defense was tertiary, because without Leavy's incompetent crew turning a blind eye in the secondary, they wouldn't have have looked nearly as good. You could coach any team to be pretty good if you knew ahead of time you were going to be allowed to shove guys beyond 5 yards, wrap them up before the ball arrives and grab their jerseys if they get away from you. All three of those things happened without penalty on a regular basis. That's not "excellent defense." That's Bill Leavy letting you do whatever you want.
Now you can call it whining all you want, but if it quacks it's a duck, I'm not afraid to call it one. To turn a blind eye to incompetence is to accept incompetence. Why do you think coaches are allowed to file complaints on referees? Is it "whining" if they file one? Bill Leavy is downgraded more often than any other crew in football. There's a reason for that. The POS should have been fired years ago after ******** up the Super Bowl.