Off the top of my head:
The 3 Hobbit movies. Just an insult to a wonderful children's tale. Jackson later admitted they went into this pretty much clueless, and it shows.
The 2nd and 3rd Lord of the Rings adaptation. Whereas the first movie had some entertainment value, the 2nd goes downhill fast and the third was like running the Gauntlet to a Tolkien fan like myself. Phillips Boyens (the screenwriter largely responsible for the desecration of Tolkien's writing) should be made to write "I should not allow my arrogance to muck up classic works of literature" about a million times, using Dolores Umbridge's 'Blood Quill' [Harry Potter and the Order o/t Phoenix.]
Peter Jackson's King Kong. I'd rather watch paint dry. Jackson should just stick to the cheap blood 'n gore horror genre instead of butchering classics.
Jackie Brown. Major yawn fest. I find Tarantino extremely overrated as a director and haven't watched another movie by him since. Pretty sure I'm not missing much.

The Matrix sequels. The original was brilliant, spawning so much story potential ripe for further exploration. Then the Wachowskis ruined it with convoluted story plots, boring narratives "explaining" the story rather than showing it, a "love" story between two characters whose on-screen chemistry could make hell freeze over, endless repetitive fight sequences..... and a subterranean caveman rave. WTF?

The Road. Hated all of the cast members' performances. Especially the kid. And what mother would walk out on her own family/child in times like that!? Awful. Turned it off half way through, no desire to finish it either.
I also can't bring myself to watch most super hero movies. Avengers, Spiderman, Captain America, Pirates o/t Caribbean, The Hulk, X-men, Transformers, etc. Shallow stories, over-dependance on visual effects for no other reason than to serve up eye candy and generally uninspired cinematography. No thanks... just not worth the time.