Sure. I think it's pretty obvious that Romo never really had a great team around him. His defenses were terrible and the few times that he did make the playoffs the defenses tended to choke. This happened for Dak last year to btw, and I think you would agree with it for Dak at least. Romo was also let down by his teammates on offense, when it mattered the most they would always fail to step up. 2007, it was multiple dropped passes, including td drop by Fasano and a wide open 3rd down drop by Crayton, followed by Crayton quitting on his route that would have won the game . In 2009, his oline just didn't show up for the game, and it didn't matter if the QB took the best attributes of every QB ever, the Cowboys weren't winning that game. In 2014, the biggest play of the game was Murray turning a touchdown into GB football by fumbling as he tended to do in the biggest spots. This was followed by Dez reaching for the endzone on that infamous play which allowed the refs to overturn what should have been a clear catch.
Football is a team game, and it doesn't matter how good you are at QB if your teammates shrink from the moment. That is ultimately the difference in Romo and Eli's playoff success, Eli's receivers catch it with their helmets and his offense recovered every single fumble they had on both of their superbowl runs, Romo's WRs quit on their routes or have a rule changed so they can rule a pass incomplete and his runningbacks fumble should be touchdowns.