I actually blame play calling more than the offensive line. Jason Garrett is stubbornly sticking to offensive plays that are predicated on having a good offensive line. In my view, the Cowboys need to move to a run 'n' gun / westcoast hybrid. I know many of you out there hate the dink and dunk approach, but the plays have to exercise your players strength, otherwise you get the results that we've seen: embarrassing. Garrett's plays have a tendency to take way to long to develop. And let's face it, Romo just simply does not have that kind of time to wait on routes. He needs to take a 3 step drop and get rid of the football.
The run has failed even more than the pass. Why? Because Garrett does not know how to develop a running game. Running straight forward on the strongside over and over as a general rule is not going to build an effective run game. You have to switch up the types of runs and Garrett very rarely does anything different than having Demarco run into the backs of his C/G/OT two yards behind the line of scrimmage.