Nintendo pleased many of their long-time detractors with the Wii. After being chastised by the supposedly "mature" gamer for years concerning their alleged catering to a younger crowd (i.e. not giving Princess Peach a huge pair of mammaries with their own physics), the Wii saw them live up to their reputation and produce titles specifically marketed towards kids and the casual gamer.
This gave the anti-Nintendo masses the opportunity to really stick the knife in and twist, even more so than when someone noticed that the GameCube looked a bit like a handbag. Nintendo's "selling out" to the casual market for financial gain was the cancer that was killing the industry, apparently, and the Wii was the first harbinger of the video game apocalypse. The real gamers were going to continue to play war games on their Xbox 360's, whilst those sissy Nintendo fans waggled their Wiimotes at the TV like a bunch of girls.