I don't agree with that at all. Romo's problems have been Romo's problems. He's had the talent and the system around him. He just makes mistakes. Cutler gets a lot of blame, but people are also noting that he doesn't get good protections. Bradford is new and doesn't even get shitted on like that to begin with. Grossman sucks, so what excuses can be made for him. Orton gets just as much praise as he does hate and is labelled underrated as much as he is bad. Henne sucks. Alex Smith sucks. Favre was garbage his last year with the Vikings. And Kolb was not blamed for what happened last year. People said that he couldn't play behind that O Line, so he essentially got the same excuse that you claim only Vick gets.
I'm not saying that Vick is a perfect QB. He's not. He can't read coverages all that well and he's relatively short so he can't see over the line as well and ends up holding the ball too long. That said, people are looking to blame the bad start on him, and that's ridiculous. When he got injured and went out in ATL, they were winning by two scores, so you can't put that loss on him. When he went out against the Giants they were either winning by 1 or within one score, I forget, but either way they were still in the game. So how do these losses get put solely on Vick. If he's the reason, then why don't they spring forward and win games when he's gone. If he's the problem, then why are they more productive when he's in the game. Clearly, there is more that's not working than the QB.
If you want to wonder why Vick has so many excuses made for him, it's because he gets more blame than any other QB. You throw out names like Grossman and forget that he stunk up the joint on his last team but still managed run straight to a starting position on another team. You bring Romo and forget to mention that he's made some of the most egregious mistakes we've seen from a QB in recent years and yet he's still treated like a darling. On the flipside, Vick has spent most of his time in games this season being ahead of the opponent despite the Offense not clicking on any cylinders, yet all these people are coming out of the woodwork to try and label him a bum. Come on, you want people to stop making excuses for him, then stop going out of your way to bash him.