I agree and have said as much. He was wrong in how he has handled them for three years. However, it's a sunk cost fallacy to imply that after three years of not listening to him, Capel's somehow compelled to tolerate it for a fourth.
Capel's under contract no matter what, so he has to control and rectify what seems like a toxic locker room. It might not save his job, but at least he's doing his job. If he brings in a class full of trash like Stallings did, then he will get fired like Stallings did. Pretty simple.