He hasn't played awful this year and I don't think he cost the Cowboys the game yesterday but his numbers are seriously inflated because of the success he's had against bad teams this season:
Teams below .500:
W @ TB - 16/27, 353 yards, 3 TDs, 0 INT, 140.6.
W Vs. CAR - 22/33, 255 yards, 0 TD, 0 INT, 89.6.
W @ KAN - 20/34, 351 yards, 2 TD, 0 INT, 113.7.
W Vs. SEA - 21/36, 256 yards, 3 TD, 0 INT, 108.1.
Totals = 79/130 (60%), 1215 yards (303ypg), 8 TD, 0 INT, 113.0 QBR.
Teams above .500:
L Vs. NYG - 13/29, 127 yards, 3 INT, 1 TD, 29.6.
L @ DEN - 25/42, 252, 1 INT, 0 TD, 67.1.
* W Vs. ATL - 21/29, 311 yards, 3 TD, 0 INT, 141.6.
W @ PHI - 21/34, 307 yards, 1 INT, 1 TD, 88.7.
L @ GNB - 24/39, 251 yards, 1 INT, 1 TD. 78.0.
*Totals = 83/144 (57%), 937 yards (234ypg), 6 INT, 3 TD, 65.85.
* Romo's stats Vs. ATL weren't included in totals because I wanted to strengthen my point and Romo's numbers in that game are so good that they made it look like Romo is doing alright against teams above .500 when he has actually struggled drastically in comparison to his play vs. teams above .500. Not to mention Atlanta has one of the worst pass defenses in the league, anyway.
I'm not blaming Romo specifically for any losses but the point here is that Romo needs to be much more consistent and stop turning the ball over so much against good teams or the Cowboys are not going to be much better than a .500 ball club.
He has played great against shitty teams and average or below against decent teams and the bottom line is that championship teams have big game QBs and/or elite defenses and right now Romo is not a big game quarterback and the Cowboys defense is not playing at an elite level.
How can the Cowboys expect to win a playoff game if Romo is proven to be mediocre at best against most of the good teams he has faced?