I don't get some of the venom, either. It's not like the guy started World War 47 here and then left or was sent packing. If you want that, hire Josh McDaniels.
Somebody asked about Beville. He is the guy who called the infamous pass from the Pats 1 against their goal line defense in the Seahawks' loss in the Super Bowl. A bad play call is one thing, and it happens. His rationale was curious, as there were less than 30 seconds left, and he decided against the run because he became obsessed with ensuring they had three more cracks at getting it in and leaving Brady with no time left. He also didn't like the run against the Pats' goal line defense (despite the fact the Pats were gassed and not stopping Lynch), but then called an slant into it instead of an out route or fade. And as for leaving Brady no time left, the ball was snapped with 26 seconds left.
What he did after that was worse. He spent weeks blaming everybody except himself for the result. He should have been fired about two days after the loss, not because of the call or the result, but the fact he was throwing everybody under the bus when it was pretty obvious who should have been eating the crow. The team from hell is McDaniels as head coach and Beville as OC.
If you have solid to good coaches, or hot names as coaches, teams are going to try and hire them away. That's the way this works. I don't think Brady is anywhere near ready to be an NFL HC, but I'd much rather have a steady stream and be quietly grooming the next guy than have nobody interested in anybody on our staff. Somebody moving on for a promotion is not normally an indication of lack of commitment.