Saved me the time. It doesn't matter how Shawn's reign started out in the ratings, or, honestly, what happened on a rival show. As the champion, your job is (or at least was) to be the guy that people pay to see, first and foremost. From 1992-1997, Bret was the guy, period, beyond whatever was going on anywhere, that WWF fans came to see the most. Just because Shawn had good ratings that went into a tailspin doesn't mean that we can pin everything on the nWo, it just means that Shawn didn't do his job on top. I'm not saying that he got a lot of help, but when you're the guy holding the belt when your flagship show gets a 1.8, you're going to get some deserved funny looks. It's not as if there was any type of decision by the WWF that could have actually forced a drop in the ratings (like there was with CM Punk). All things were equal for Shawn and Bret, and nothing like that ratings drop happened to Bret when he was on top (in fact, he was the guy getting calls while injured to do international tours solely to make sure numbers didn't collapse).
I don't even want to address the preposterous point about Bret letting the Screwjob define him, especially when you turn right around and insinuate that Shawn isn't somewhat defined by it as well. They're both marked by their actions in Montreal, mostly because it was a very significant event in the history of Pro Wrestling, but also because people refuse to shut the fukk up about it. Hard to get around the event when everyone wants to conduct discourse on it long after the parties involved have buried the hatchet.