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

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For me, it's a bit complicated when it comes to the Wii U.

On the one hand, I can't honestly say I didn't get my money's worth out of it, as in spite of its awful droughts I did thoroughly enjoy games like BOTW, Bayonetta 2, Mario Kart 8, Tropical Freeze, and Splatoon.

However, had I known then what I know now, I could have skipped it entirely and played almost all its worthwhile games on the Switch.

And coming after the Wii, which is my #2 best system of all time, it was a massive step down.