Clearly exageration here as Jak 2 is VERY frustrating but it is far from a bad game. I do remember I stopped playing it on PS2 because of the driving controls but I was able to power through the HD version. Not sure if Vita version is a problem though.
Must be a generational difference between older gamers and newer gamers. I loved Jak II, beat it probably 3 or 4 times including a 100% on it. Didn't really find it frustrating, it was hard but not too hard imo.