Well, no matter how much you defend The Saint™, a good coach should be able to coach up what he is given.
This year, he hasn't done that. I know, injuries have played a role. But if he is a good as you (and others on this board) think he is, a 5-11 season (which is what it is looking like) is certainly at least a letdown and disappointment, and at most, a fireable offense.
As to TC, who knows? But to say he sabotaged his coach before the season even began by not upgrading the QB position just so he could fire Doug "The Saint™" Marrone and get himself back on the field next year when he'll be 73 years old is just, well, another tinfoil hat conspiracy theory.
{anxiously awaiting response with yet another conspiracy theory}