There is no statistical background for this list. These are just the jrpg's this gen that I thought were particularly bad, though I don't quite hate most of these games (I wasted over a hundred hours on Last Remnant...for some reason).
Except Star Ocean 4, such a god awful game and disappointing after 3. The characters are all crap, basically just cookie-cutter tropes, at least XIII had a pretty decent playable cast, not the best ever, but not SO4 bad. If you think XIII had bad writing, SO4 had an awwwwful awful script made worse by the terrible voice acting (even in Japanese thanks to Lymle). If the game were even decent, its 300hr+ platinum might have been worth getting, but sadly it's not because it's such a bad game.