The PSP sold 80M units so I think that the market really liked what they got.
And how much of that was for the experiences Sony touted as the reason to get it? They never pushed Monster Hunter which is what gave the system the boom it needed, and instead pushed God of Wars, Resistances, and Battlefronts, all of which have their worst selling titles on
that very platform. There were other products to get besides those, of course, and the timing of the platform allowed more of that to nourish. You had middle and low-key releases and weren't left with extremes.
Now, look at Vita. It's literally those types of console-wannabe games, or something far more niche and under the radar. There's no middle; it's either wanting to emulate AAA, which failed as usual, or what one can consider a low-key release. That middle is on 3DS, and that's obviously seen in its far meatier, beefier lineup. Where is the middle between a game like Killzone and Danganronpa, or between Unit 13 and Ys? There very frankly isn't one, and the horse they bet on was sinking in the mud before the platform even launched.