I think that is a bit short-sighted. So much depends on others.
Look at 2007. Brady struggled throughout but drove late to score the go-ahead touchdown. And if Asante just..I don't want to get started. But Brady could have had his 4th ring then. Brady did his job.
In 2011 it was that Welker drop, but had the D held on, that's 5. Meanwhile in 2014, Brady led an epic comeback, but if Butler doesn't make that interception, Brady is potentially 3-3 in Super Bowls.
The point is that sometimes it's totally out of a QB's control. Brady did enough to potentially be 7-0, but I don't blame him for the 2 losses. It's about more than just him.