Yep, Austin makes those mistakes too, but people want to crucify Dez for all of his. Remember the one Austin lost in the lights last year? That catch puts the eventual SB winner at home for the playoffs. Still don't know who to actually blame on that, but I do know that if it was Dez people would have been screaming to trade him all off-season.
Romo does press too much though, that's usually when we get into trouble. A better/consistent ground game makes him much better but we haven't had that. We get down to most teams 10+ points really fast, then get surprised he makes a mistake at that point in the game.