Sharknado was on not long back. It was bad. Not "so bad it's good", just bad. I regret trying it and I demand that 30 minutes of my life back.
End of Days is one of the most boring movies I've ever watched half of and gone to sleep during. I think even the ****ty Schwarzenegger movies still enjoyable, but this is pure unwatchable.
Tron. It was just boring, though to be fair I can at least see how it would have been cool when the original came out.
Star Wars. No specific one, just Star Wars. Nothing makes me want to claw my eyes out faster than having to sit through more than 15 minutes of a Star Wars movie.
I could list horror movies but that list would be near infinite. I like horror movies, but the genre is saturated with metric **** tons of pure garbage.
Children of the Corn (2009). My friend and I watched it together one night, and it was weird. Not to mention, at the end there's this really disturbing scene that just grossed me out. The acting was bad, too.
It was a bad movie, but that cult leader kid in the suit (I can't remember his name) made the movie at least somewhat bearable.
Steven King movies (well, the ones where he had input) are just awful though.