The REAL reason the Wii U is struggling and what needs to be done! Nintendo fans, get in here!!

[Soundwave]

To get back to the OPs point, there's no singular reason the Wii U is struggling. Nintendo made about 3-4 crippling mistakes.

You don't get sales this ugly without several bad decisions. Even Mario can't do much with this mess.

The controller is one issue but not the only one.