What's the most disappointing game system you've ever owned?

[Jranation]

I only owned the PS2, Wii, DS, Wii U, 3DS and Switch.
The worst will be the DS since I used it the least amount out all of these. The best times I had with the DS is when many of my classmates decided to bring their DS and play MarioKart. But I had fun using all of these consoles.