I don't really count what I've seen as hate but ignorance on the matter
Vita has no games: Okay I guess backwards compatibility with PSP digital titles, PSone titles don't count as good games. So no FFVII, Monster Hunter, God of War and such. "But that's not exclusive" The previous still counts as you can transfer it to your PS3/PSP and keep playing, but exclusive PSV titles? Persona 4 Golden, Disgaea 3, Ragnarok Odyssey, Uncharted, Unit 13, Soul Sacrifice, Playstation All Stars, Sly Cooper, Rayman Orgins are all great Vita titles and some you can even get free when you buy the PS3 versions.
And I've not really seen others offer a similar thing as mentioned above, also any PSOne game purchased on your PS3 also transfers to your PSV/PSP so there's some more awesome for you. Too buff this up if you pay for PS+ you get to play a number of PS3/PSP/PSV games free and it's cross platform when you buy, and I don't think saying it's not worth it qualifies when people pay for XBL and all they get is free adverts on their console.
Vita is too expensive: Well I got my vita for $189 flat which included a new 8GB card, new game and shipping vs 3DS-XL with nothing= $199.99+tax. I'd say the price for a 3DS XL on ebay but they're always cost near new systems. Now that doesn't take into account the PSN games I bought that work on the Vita that I already owned, so I got a few games to play with considering.
So again it's not hate, it's not stupidity.... people just don't know better or try to get a deal.