The hardest thing to do as a QB is to break into the league and stay. I call it the QB curve. Brady never had to do it like the others because they were stealing signs and letting him know what coverages and where the blitzers were coming from. Brady didn't even have a 2:1 Td to INT ration until his 5th year.
He developed into a great QB but to be called the best, no, you have to pay your dues and he cheated that. He is the most accomplished when all is said and done. How he did it, he has to look in the mirror about and all the cash in the world doesn't change that.
Maybe I'm old but there should be integrity in sports IMO.