Didn't the Wii-U mostly fail because most people didn't know what it was? The marketing and name were terrible and plenty of people thought it was just a Wii add-on or something.
The console itself was actually pretty cool, playing Wind Waker on it was great.
For me personally, Wii U was the worst console purchase I've ever made lol. If it wasn't for Smash, Mario Maker and Nintendoland with friends every once in a while I never would have turned it on. I honestly had way more fun with the Vita.
It's not really fair to compare it to the wii u because the wii u was a handheld console while this is basically a hand held gaming streaming device. The wii u is more compared to other handheld consoles/computers like the steam deck or Asus rog ally.