It hasn’t worked out as planned with any of the coaches he’s hired since Barry Switzer, which means it’s likely not the coaches but the players.
Or............ the guy in charge is hiring the wrong coaches.
Look at the list of coaches hired:
Parcells - we pulled him out of a TV studio. He was at the end of his run. It's not like we hired Parcells in his prime.
Dave Campo - Was terrible and the market bore that out as no one even considered him for another head gig. He bounced around as an assistant the rest of his career, never showing anything impressive in any of those stops.
Wade Phillips - Went back to being an assistant after being fired, never sniffed another head gig other than as an interim when the Texans fired their HC. That is until the XFL came calling and handed him a head job.
Jason Garrett - Despite protestations from some here claiming he would get snapped up immediately, Garrett never got another HC job again and is now in television because likely no one in the NFL sees value in him as a coach.
Chan Gailey - Bounced around again as an assistant after getting fired. Had an OK run at GT as a HC and then got the Bills job and bombed out there as well.
You'd have a much stronger argument if there was a trend of Jerry hired coaches going onto success elsewhere after coaching here. You could then make the case that the players here, the culture here held these guys back. But the reality is every coach we've hired since Switzer has either never seen another head job or if they did, didn't perform any better than they did here.
And this doesn't even begin to talk about all the assistants and coordinators Jerry hired and foisted upon his HCs. Monte Kiffin was a priceless one.
The issue isn't the players. It's the GM who just sucks at hiring coaches. So when he gives McCarthy that ringing endorsement and brings him back for another year, history tells me Jerry is just repeating his consistent mistakes when it comes to evaluating coaches.