Well for one, I don't think the defense ever complained about it...
Another thing you have to consider is all of the bad field position that we had last year. The special teams would screw the offense and then the offense would screw the defense by not moving the ball much.
Plus, when the secondary has to chase receivers all over the field the whole game, they're probably going to give some stuff up towards the end of the game.
It was just a poor team effort all around, but the offense was by for the worst squad..
Having said all of that, I think that Parys will make a good defensive player for someone.