Gamecube, Vita and Wii U.
Gamecube was a failure. You can't look at the unit sales alone - you have to look at the price. The Gamecube hit ludicrous low prices to get to 22m sold. It was $99 for Christmas 2003! Ninety nine us dollars!
Anyway, Gamecube and Wii U had stellar first party games. Vita was the perfect handheld for its time and got a couple of big AAA games but even more super high-quality indie games that really suited portable play.
Dreamcast, on the other hand, was very arcade-focused. As someone who never liked arcade games or arcade gameplay it just wasn't for me.
Because the 360 and PS3 sold 80m units compared to the leader's 100m, and did so at a high price. The Gamecube sold 22m compared to PS2's 150m, and did so at a considerably lower price with better hardware. It even got beaten by Xbox, a totally new console no one trusted to do anything but bomb at the time. And based on the support they received, Gamecube was the runt of the litter.