Going through my iTunes library in alphabetical order, to see what I can find...
.
Suck It And See by Arctic Monkeys. Massive disappointment after the awesomeness of Humbug. They just lost their edge completely, very generic album.
Everything after Not Accepted Anywhere by The Automatic wasn't good enough to stay in my music collection.
Intimacy by Bloc Party. Had some great songs, like Halo, Talons, Ion Square, Your Visits Are Getting Shorter and Flux, but some absolute stinkers as well. Mercury was an awful choice for the first single, Biko was 5 minutes of boring, and there were a couple of other well below-par songs in there as well.
Tonight: Franz Ferdinand was a waste of time for everyone involved.
Interpol's self-titled didn't sit right with me. The bass lines were less prominent, the guitar lacked punch, and the vocals weren't quite up to the high standards set in their previous albums.
Shine On by Jet was just a massive "what the fuck are they doing?!". Completely lacked the spark that made their first album a massive success. They did recover it a bit in Shaka Rock, I'll give them that.
The Future Is Medieval, by Kaiser Chiefs, was just a massive facepalm. They supposedly had a massive catalog of songs they could pick from, yet barely any of the ones they chose were any good.
The Killers lost it after Sam's Town.
As previously mentioned on numerous occasions, Minutes To Midnight by Linkin Park was a massive flop, and for good reason. If you ignore where they came from, at least Thousand Suns and Living Things are decent, but M2M was just all round poor.
As far as I'm concerned, Metallica haven't made an album since The Black Album.
Congratulations by MGMT was a drastic change from their first album, and not for the better.
The Resistance by Muse didn't capture me. A few too many filler songs, and a load of pretentious wankery with their symphony. The 2nd Law is a clear improvement IMO.
Nirvana's only good album is Nevermind.
Beacon by Two Door Cinema Club is good, but Tourist History was considerably better.
Ritual by White Lies lacks the deep wells of emotion that you can feel bleeding through in To Lose My Life, and is worse off for it.
.
And we're done.