teams win superbowls, not individuals. the giants defense stepped it up big time in the postseason, and was a major factor in why the giants won a superbowl. yes manning played well vs green bay and played well vs the pats in the superbowl not turning the ball over and making big throws, but again, in order to be elite as a player, u need to do it consistently, such as the bradys, peytons, rodgers etc do.
Teams do win Super Bowls. But to complain about Manning only leading the Giants to 9 wins, how is that all on him? The Giants allowed the 8th most points in the league in 2011. A QB has to overcome his defense in times when they're defending poorly.