You don't need to feel sorry, Wii U has a lot of great games.
Never doubted that but if you own a Switch you don't need a Wii U. So the people who bought a Wii U and a Switch got ripped of by Nintendo in my opinion.
Actually, most WiiU buyers, like me, felt ripped when Nintendo stopped "supporting" (i.e. making new exclusive projects) the platform in early 2016.
The WiiU had 2 and a half years, from mid 2013 to 2015 end, in terms of great releases, after that, few good games were launched and the lineup was most composed of indie titles. Nintendo could, at least, localize some Japanese games, or make deals with third-parties to bring more ports to the platform. A price cut to boost sales would also help, but they never cut its price, not even when the Switch was announced. This is something I really don´t understand why.
Of course, many of its good exclusive games were later ported to the Switch, something that "reduced" the importance of the WiiU as a collector´s piece, but on the other side allowed more people to enjoy those games, that really deserved more recognition, like Bayonetta 2 or Donkey Kong Tropical Freeze. As a WiiU owner, I really don´t felt ripped by that, but by the lack of support after early 2016