The Wii U, as in so many other cases and with so many other products, is one of those "if you don't love it, you hate it" devices where fans of it will accuse anyone who dares to direct criticism at their product are labelled as haters, no matter how valid and true that criticism might be.
There certainly is hatred but for the most part its well reasoned sceptics voicing their opinions, backed with actual arguments. Labelling everyone as "haters" is clearly a lot easier than countering arguments but it hardly stimulates intelligent debate.
Just think about that for a second.
End of 2016 hardware sales:
Wii U: 15 million. PS4: 54 million. One: 30 million. 3DS: 64.8 million. PSVita: 15.2 million.