No offense, but what early days? Launch? NSMBU was a good game, but people didn't care about it that much, because they had JUST come out with NSMB2 on 3DS mere months earlier, which was a massive mistake on their part. Nintendo Land, to me, was a major disappointment. Unlike Wii Sports, it was not a simple and fun "pick up and play" type of game that was easy for anyone to understand. They were obviously banking on it being their next Wii Sports, and luring that casual crowd back. Didn't work.
Because having lived through it, having bought the console at launch, the next near-year was a long, dark drought where almost nothing came out on the console.
Wii U has had some good games, but it is easily Nintendo's worst home console to date. The controller was fine, the hardware was fine, but Nintendo fumbled this console like a bobbling NFL pass from the outset, and never really got it under control. They mismanaged marketing, development, game releases, you name it. It's not a BAD system. But it IS a flop, also. I know this, because I sat around waiting for the system to finally truly recover and take off. It never did.