Broncos winning with Peyton Manning - "We all know Peyton runs that team and Fox has nothing to do with it and is just a figurehead".
Broncos get blown out in Super Bowl - "Hahahaha Fox blew it, all his fault, damn he sucks at play calling and can't coach".
I don't think that is the case at all and it way oversimplifies the criticism. The first part is true, Manning and company steamrolled all season long and Fox was never called upon to come up with brilliant game plans or adjustments. Then in the SB when Manning was choking and Seattle's defense was stifling Fox was called upon for his coaching prowess. the rest is history.
I love this nugget from a Broncos forum:
"John Fox held the Broncos back from winning more with The Golden Calf of Bristol and that impressive defense and everyone knows it- nice try. Run, run, run, punt; you remember that? Or how about the fact the offense was complete crap until the coaches opened up the play book with 1 minute left in the game. Or how about the fact Fox tried to roll with Kyle freaking Orton originally that season..
There are very few coaches who have been around as long as him and been so terribly unsuccessful. Guy is worthless in his profession. Nothing against the guy but he doesn't deserve credit for anything- he's never accomplished anything."