Yep we can and should put a ton of blame on him, he was ran out of Chicago for making some of the all time dumbest coaching decisions and then came here and the defense hasn’t looked like it practiced at all most of the season. Players are out of position, looking clueless half the time, and the scheme is head scratching many times like when DBs are lined up 9 yards off the ball on 3rd and 5 situations.
And remember, Quinn had largely this same defense racking up turnovers and sacks. The weakness in the middle was hidden until it wasn’t. With ‘flu, every team walks up and down the field without any resistance. When your offense is averaging 30 per game, you should win at least 80% of your games period. I’m fully convinced that even an average DC could’ve had this defense in the 18-25 range which would’ve = to several more wins and staring at playoffs.
So yes we can and should blame ‘flu. No defense has all stars at 11 positions, but 30 defenses are significantly better and giving up fewer points and yards. In fact, Dallas has four players on d who have been selected to a probowl, only three other teams have that many or more.