I don't think so, based on this article: https://www.sbnation.com/nfl/2019/12/19/21024347/nfl-worst-playoff-teams-history-losing-recordsAs we are all pretty aware of, the WFT's chances of advancing in the playoffs are slim. But, can you imagine a team that didn't even win half of its regular season games winning the superbowl?! My memory is horrible, but the Giants are the only 'modern' era team to have less than 10 wins wins (9) and win a superbowl aren't they?
In 2006 the NYG made the playoffs with an 8-8 record and did not make it to the SB. But in 2007, with a winning regular season record, the NYG won that SB. I think the NYG won again in 2011 with a winning season. Weren't both of those SB wins (in 2007, 2011) by the NYG against the Patriots?
But 2010 I do remember: BEASTQUAKE Seahawks (7-9), won their first playoff game against New Orleans.