I loved Romo and I love Dak. They are having similar careers but rabid Romo lovers will tear down Dak to build up Romo. To be fair, it happens the other way around too. They will never forgive Dak for taking Romo's job. They root against Dak so Dak can be seen as a failure like Romo is. That's why you see the Romo hate.
BTW, I loved Romo's episode. He's a good dude. He's not a leader though, and you have to be at the QB position. I think that was the only thing he was lacking. I wished they would've included his last TD he threw. I don't know why they didn't. He came in on that drive and marched them right down the field for an easy TD.