Some critics think everybody HAVE TO HATE commercial successes. Rumours was a pop commercial success, but what's bad about it? Lot of commercial music is bad, but there are very good stuff too. I love Rumours and it's my favorite album even more than Tusk, and their songs, they are great. I see that album as a very good piece of work.
There is also the personal opinion of course. All my friends loved the MATRIX films. I always fall asleep watching Matrix. Sorry, that's the truth.
I hated lot of disco songs, but I loved others, specially Donna Summer. I loved Dark side of the moon, Wish you were here, as I loved Off the Wall, Thriller, Rumours, Tango in the Night, Mussorgsky, Beethoven's 9nth symphony.. I have different tastes!
That guy doesn't explain completely why he Rumours dissapointed him, or why he doesn't like STevie. It seems he just like less popular music. There are lot of critics who think that way. Frankly they are not original at all.