http://www.nfl.com/news/story/0ap2000000299618/article/packers-happy-cowboys-abandoned-running-game
Maybe he spazzed out, because they called a pass play and abandoned the run completely like usual. Your argument would make sense if they weren't running the ball effectively the whole first half and Romo wasn't handing the ball off.
Garrett like usual tried to throw Romo under the bus, when he said Romo should have run the ball. So your claim they tried to cover for him is false. There was no changed play, Romo had the choice to run or pass and per what he saw, he chose correctly based on the formation GB was showing. He got pressured and mad a bad throw.
Your argument would actually make sense if they were actually running the whole year and not abandoning it, but they weren't. They ran four times against Minnesota.
Your argument would make sense if Romo, on his first season with Linehan as play-caller, Romo only had 7 INTs, throwing close to 40 TDs and was doing fine handing the ball off.
Your argument would make sense if Romo was involved in game-planning when Garrett was controlling the offense, but he wasn't until he got the new contract.
BTW, Linehan totally implemented play-action with Dak, almost double the pace of Romo in 2014. What you call audibling at the line like Romo was nothing of the sort. Linehan was calling play-action for Dak consistently.