IMO her worst albums to date are ASFXX (just cuz it sounds like a generic jpop album arrangment/music-wise) and Secret (a rushed mess, even if all the songs were great, it doesn't work as a whole).
I think people just tends to expect a 2nd "this album" or "this pv" too much and get disapointed when they notice she went on the oposite direction, some time after that, they listen to the song/watch the video/etc and realize that it was good, turning the new work the new enemy
My top 3 would be (miss)understood, RAINBOW and NEXT LEVEL
IMO RnRC is turning out to be her most generic album since My Story... but a good, fun, interesting generic^^