Jon Niednagel, evaluator of sports talent, the guy who worked for Danny Ainge in Boston, and came up with the Brain Types theory I've mentioned here before -- was absolutely obsessed with writing large treatises on why Brady was the most overrated QB in history.
I can't tell you how many articles he had on BrainTypes.com through the years where he talked about this at length. You can even find some stuff on Google if you search Niednagel + Brady.
Anyway, he always said that Brady didn't possess the ideal QB Brain Type (whereas he said Peyton Manning did). And Niednagel always said that Brady succeeded only because he was in Belichick's system for so long.
I follow pro football only somewhat (it's a distant second favorite team sport of mine to basketball), but I wonder -- if Brady's success was only because of Belichick's system, as was Niednagel's emphasis -- then how did Brady win with the Bucs? Do the Bucs have a similar offensive scheme to the Patriots teams?
I've always found Brady rather annoying and don't have a dog in the fight. But I just remember Niednagel always went on about this for years when he wasn't criticizing liberals, ENTP Brain Types, and the current political climate, or when he wasn't going on about his own rare Brain Type being supposedly the only one to observe and analyze reality empirically, the most moral Brain Type, etc.
(I do buy into his Brain Types theory somewhat, but the man was often prideful and myopic about a number of topics.)