Let It Be is a pretty decent album, but the band was so full of angst against each other at the time, I can understand why they didn't like it (or at least some of it).
The Elder is actually a very good album, but it wasn't a typical KISS album in its day and still isn't. Of all of the KISS studio albums, I have a very special place in my heart for this one and still listen to it quite regularly.
Never Say Die is trash. I can't argue with Ozzy on that one as it is easily one of the worst Sabbath albums (certainly the worst from the original lineup).
It's Hard is not good. Eminence Front is a cool tune, I've always liked that, but the rest of the album showed why it was their last album (I don't count Endless Wire, it's a GD sham to call that album "The Who")