There are a bunch for me that fall into a few categories,
Disappointing after a great previous release: Silverstein. God, Dead Reflection was SO GOOD, but I knew what direction ABPTD was going even from the singles. Don't get me wrong, I like catchy Silverstein, but the only song on here that feels like them is September 14. Also, The Ghost Inside gave me one nice listen and I haven't picked it back up.
Albums with great singles that disappointed on full release: Polaris, Currents, Amity Affliction
Albums that I didn't even have high expectations for: Asking Alexandria, August Burns Red, The Word Alive, Four Year Strong
Albums hyped by other people that I didn't care for: Bury Tomorrow, Ocean Grove, The Weeknd, If I Die First