The difference between Brees and Romo is Brees gets the benefit of the doubt. He got the Saints to the NFC championship game in 06. Won a Super Bowl in 2009. Won a playoff game last yea and probably should have beaten the Niners if they had any sort of defense.
Romo has just won 1 single playoff game. That's just how it goes. If Romo would have won that playoff game against the Seahawks and got to or won the Super Bowl in 2007, there would be a different outlook on him from the media standpoint.