Too many to ever possibly list, or none at all, depending on how you look at the original query. I hate a great many things*, so imagining a universe where they simply do not exist is a persistent fantasy of mine, but this would extend over the majority of everyone releasing music's entire careers, so I could never hope to break it down by album.
Conversely, all the groups I follow enough to own albums from don't release crap, and if there was ever a shaky patch that would have diminished my appreciation for their talents, it tends to be near the very beginning of their discography, not somewhere in the middle or towards the (current) end. You can't really hold it against a group for improving over time after all. Ergo once again listing specific albums would be impossible, because I have none to point at and exclaim "Boy, was it ever a mistake to release [Album Title]!".
[small]*For a reasonably accurate idea of just how much, ask yourself this question: "What music do I like?" Whatever the answer is, I probably hate it (where 'you' are the average citizen - here on the Escapist there is a statistically higher chance I don't loathe your favorite bands and instantly find your character wanting because you openly admit to enjoying stupid crap, but the odds are still against you).[/small]