I hate "Dr. Zhivago." Hate it hate it hate it. It's not that I'm opposed to older films, I love many old classics. I just hate Zhivago. SOOOO much.
I also was bored to tears by "Nashville" and I think "2001" was 40+ minutes too long.
On the less arty front, I don't like any TOS Star Trek films except "Undiscovered Country."
So, what great movies do you hate?