Wii U or GameGear..... Gamegear takes it.
I know people love gamecube here, but its one of those that never really impressed me that much either.
It wasnt as bad as Wii U or Gamegear, but it wasn't amasing either.
3rd worst = gamecube
2nd worst = Wii U
1st and worst = GameGear
Maybe I just had bad luck with games for it, I was pretty young back then and it was just stuff mom and dad bought for it.
However the gamegear experiance wasnt anything great for me