I think both can happen -- most like to complain, and they can have legit gripes. There's A LOT left to be desired from this season's team, but pinning a players progression, or regression for that matter, only on the coaching staff is just dumb. Feels like a lack of accountability pressed towards the player. Both sides needed to grow quicker.
Overall, I'd say the staff was slow to adjust this season. They eventually took the steps to become a defensive team, but it was just too late.