Why did the WiiU fail?

[LipeJJ]

SvennoJ said:

LipeJJ said:
1- Expensive for what it was/offered
2- The Selling point/gimmick wasn't well implemented (even Nintendo didn't use it very well overall)
3- Bad marketing
4- Bad name
5- Big Software droughts.
6- Uninventive and unambitious games for the most part (Worst console 3D Mario, no new Zelda or Metroid, 2D DK instead of 3D, Smash Bros. wasn't exactly exclusive, etc. Software wise, the only bright points of the system were MK8, Splatoon and Mario Maker).

Most of that can be said for the early ps3 and XBox One as well.
Perhaps WiiU is proof of how important 3rd party support is or of the inability of Nintendo to 'fix' a console.

Third party support is important, but it's not a defining factor.  Those problems affected PS3/360 like you said, and that's why they flopped for 3 years or so, but since they had third parties and both started releasing more important first party titles, they started growing. But make no mistake, PS3 still ended being the worst selling PS despite being on the market for 11 years.