BYU started playing worse and losing, Coach Howell became increasingly volatile with the players. In short, he was losing it. I won't get into specifics but there are several. Players on the leadership council went to Bronco, who addressed it with the other coaches who gave their input that Bronco needed to step in, which he did.
Howell had neither the maturity or experience to run the defense.
Monty is trying to sensationalize something that is #1-not even an issue anymore, and #2- wasn't even a "locker room" problem. It was a coaching problem involving one coach and it has been addressed and corrected.