NFL coaches know a lot about X's and O's, but managing rookie QBs, not so much.
When it comes to the care and feeding of rookie quarterbacks, NFL coaches are clueless. They can beat the Tampa 2, they can create endless stunts and blitzes, they can detail the intricacies of the spread offense, but they can’t figure out how to handle a rookie QB. NFL teams spend millions of dollars on wildly successful college QBs and then they turn them over to their coaches and cross their fingers.
The NFL is a win-now league. 2 bad seasons and everyone, including the people who drafted the QB, are usually gone. And if those people are gone the QB is usually next out the door too. No one is given more than 2-3 years to figure out a rebuild.
That's fair, but how many losing seasons have they had since then? You don't fire success, unless you're the Bears firing Smith after going 10-6 but kissing the playoffs