To be honest, it's hard to be a CRPG fan if you don't like/rate games that are flawed gems. Around half of the top 10 are 'flawed gems'.
Only half?
PST - horrible combat
FO1/2 - horrible combat, brain dead followers
BG2 - fighter combat is literally just auto-attacking, companions auto-level into garbage skills, brain dead enemy AI (as evidenced by fan patches), lots of
progression traps (maxing out thief skills, going druid), particularly bad class
balance
Arcanum - no comment
Bloodlines - incredibly bad combat, tons of unfinished/unpolished content,
progression trap for non-violent characters, worse boss fights than DX:HR
Morrowind - roll-to-whiff, wikipedia dialogues, horrible game
balance (magic in particular) that encourages gaining metaknowledge, which in turn makes the game piss easy (actually one of my top three games, but those are legit flaws)
Fallout: New Vegas: SPECIAL, truly horrible engine
[Gothic 2 - some boring areas towards the end game, but actually very short on negatives]
Wizardry 8 - enemy movement animations at 1/10th the speed they should be, lots of questionable
balance decisions (paritcularly Arnika Road), overzealous respawning
9/10