It's not Sony's fault - it's the market. They put up first party games, and they simply didn't take. And they did have some amazing games too, so it's not like quality was an issue.
Vita's not a console, and is in no way indicative of how the PS4 is performing. Do you really think the PS4 is going to never, ever get first party support?
I don't have a PS4, I have a PS Vita.
And no, they didn't put up enough
quality first party games. The only first party games that had overwhelmingly positive reviews were LBP Vita and Tearaway. None of which were system sellers, unfortunately. Apart from those and Gravity Rush, Sony took a couple of their franchises (for example, Uncharted) and gave them to studios that were not the creators of the franchise.
Sony purposely held back their most talented studios so they could work on PS3 and PS4 games, and let the PS Vita get the leftovers. This of course didn't result in blockbuster, system selling games, so they resorted to what the PS Vita is now known for: ports. Obviously this didn't sell systems as well, so now it's the market's fault because they don't want handheld consoles, right? Oh, but meanwhile, the freaking 3DS is on its way to sell 45 million units. Huh. I
wonder what kind of voodoo Nintendo did.
If the market is hostile towards the Vita, then I, as a consumer,
EXPECT Sony to fight back that market by pushing out quality software as often as needed until everyone who has the means to get a Vita but doesn't feels like an idiot. It's their system, it's their responsibility. I have every right as a costumer and Vita owner to feel disappointed.
They didn't take enough chances with the system, and this is the result.