This is true, but it's also a result of the 2015 Denver defense absolutely dragging his corpse to a title. 14-13 should probably have been 12-14 with a single title.This used to be considered pretty good. Brady’s string of statistically implausible success has broken peoples brains.
But either way, the knock is that both Rodgers and Peyton were generationally great QBs who didn't live up to their regular season prowess in the playoffs. When you get home games and byes year after year you should win more. I don't think Brady's success has anything to do with how we view Rodgers and Peyton, honestly. Winning 7 titles is obviously ridiculous. But you'd expect more than 3 combined titles from these guys.