Sounds like you pulled it out of your rear as I suspected. And I just told you, Romo did not struggle in those games, so whatever point you are trying to make about "the team" is irrelevant. Other quarterbacks are the types that have "won big games"? That goes against exactly what you just said, which is that these type of games tend to be pulled out against teams that aren't very good. Let's look at Drew Brees comeback since 2014, and the opp. records:
2-14 Tampa bay
2-14 @Tampa Bay
4-12 Dallas
6-10 NY Giants
8-8 @Atlanta
5-11 @ San Diego
6-10 Carolina
10-5-1 Seattle
7-8-1 @Arizona
7-9 @Green Bay
7-9 Washington
So one winning record... sounds like greatness to me. And glancing at other quarterbacks it appears to be more or less the same. The only exception I would guess would be Brady, because the Patriots pretty much win every game comeback or not. It sounds like your original hypothesis is correct, but your attempts to make Romo look bad are weak and baseless.