If you want to trash him for last year, fine. But then you have to credit him for the two excellent years. Be consistent.
Last year's defense took the field having lost some serious studs. They lost 3 linebackers that got NFL looks including KVN. They lost Sorenson who made the Chiefs roster. They effectively lost Manu and Bronson on the DL because inexperience on the LB corps led to the Kaufusi olb experiment.
The world doesn't happen in a vacuum. Ok...ignore mitigating factors and trash him for last year...But then praise him for the two previous years. To do anything else is intellectually dishonest hypocrisy.