I don't think he's protected more than any other QB. I mean there have been some God-awful roughing the passers calls all around the league, but because Brady wins a lot it gets magnified for him.
I'll be the very first to admit that the Roughing the passer call in the AFC Championship game was an atrocious call.
But, so was the Philly Special not being called an illegal formation.
So was the intentional grounding call in Super Bowl XLVI,
So was Eli not being called sacked in the grasp in Super Bowl XLII (and then the refs call Cassel sacked in the grasp on the exact same situation in 2008.) -
https://youtu.be/tyaxKikBj6g?t=637
So was the entire regular season game in Denver in 2015.
No one gives a shit about any of those because they happened to the Patriots.
This is why EVERY. SINGLE. PLAY. should be reviewable. Coaches have two challenges, if they use them and then something happens too bad. If they use a challenge and there's not a good enough angle of the play, too bad. But leave it up to the coaches, not the chimpanzees this league laughingly calls "officials."