Hey! I had a Vita! I absolutely...can not argue against your point. I mean, the Vita itself was a nice, powerful system. Sony just refused to do **** all to support it. Out of the few games I had for it, only one of them (Gravity Rush) wasn't also on the PS3.
Great systems but stupid handling seems to be a thing.
Gamecube - Great system but proprietary disks and poor relationships with third-parties killed it.
Vita - Great system, but a good majority of the games on it were also on the PS3 and Sony stopped supporting pretty quickly after it released.
Wii U - Great system, but boy oh boy did Nintendo ever screw the pooch with marketing and third-parties.