I agree that the coaching carousel, in both the NFL and NCAA football, is ridiculous. Coaches and QBs get way too much credit and blame, and you can't possibly isolate the impact of a coach after a single year, or even after two years. Sure, guys like Bill Parcells or Nick Saban can almost single-handedly turn a team around, but those guys are extremely rare. You need to give guys a chance to work on changing the culture and the physical makeup of the team.
NBA isn't much better, either. Hornets coach Byron Scott was coach of the year a couple years ago. They had a bad year last year and a slow start this year, and now he's gone. Scapegoating the coach for something that involves questionable GM/ownership decisions and sub-par players is way too commonplace. Unfortunately, though it pisses us all off from time to time, it's hard to fault coaches from going where the money is first chance they get. Because even if you are loved today where you are, you could be gone tomorrow if your team doesn't produce. Jason Garrett was one of the hottest coaching prospects in the league a couple years ago. Then his team had a bad year and nobody wanted him. If teams come calling again after this year, if I was him, I would take the money and run.