Well, I'm the dude who has played through a full franchise of Madden 2005 (30 seasons) on the hardest difficulty with all the sliders set to maximize difficulty and still won every game over the course of those thirty seasons by an average of 50-60 points with 5 minute quarters.
It's one of the very few games I ever got good at.
So, for me, I'd say no, but I think i general I'd go with it. I mean, what else could it be? Anything beyond 1 season is subjective. 5 seasons? Why 5 and not 6? 10 seasons? A whole franchise? Who says what's beaten and what's not?