The 2007 win wasn't a fluke. Last year, however, come on...
Look how the Giants got to the playoffs in the first place... it took Dallas choking, missing fields goals and letting inferior teams comeback to beat them. So, yes... that's flukey to begin with.
Then you have the Packers, at home, for the first time all year dropping countless passes.
The San Francisco game... one guy with 3 fumbles. Not to mention had the Saints hadn't hand that game over to San Fran in the first place that there was zero possibility of the Giants coming to New Orleans and winning in the dome, so they got lucky in that case too.
And New England with the Wes Welker and other drops... not great defense, guys fucking up just like Green Bay did.
The Giants won off of other teams mistakes, not by actually being the best team or in some cases even causing those mistakes. Eli deserves credit for his toughness and play under pressure, and of course the defensive line stepped up just at the right time, but that team was still really, really, REALLY fortunate things went the way they did. To me, fortunate can equal lucky/fluke at times, and this is one of those cases.
9-7 team and the first Super Bowl defending champion to lose the next year on opening day in the last 8 years. If you don't want to call the Giants a fluke, then fine... I'll settle with saying they're the worst Super Bowl winning team in NFL history.