I'm seriously tempted to say 'all of them'.
Films always seem to be either unbearably boring (e.g. that black and white famous Italian 50s or 60s 'art' film that I can't remember the title of but was supposed to be really good and arty but was in fact boring, sexist and incomprehensible) or just completely formulaic and insulting to one's intelligence (e.g. anything with Schwarzeneggar or Gibson in it).
I'm hard pressed to think of any movie that wasn't basically crap, including most of the supposedly 'great' ones, e.g. the abysmal, utterly moronic, incomprehensibly over-rated Exorcist, or the utterly stupid and nonsensical Bel de Jour, etc...
The only tolerable films are those that aim squarely for the quality end of 'disposable entertainment' and avoid being either pretentious or totally formulaic, e.g. Spielberg when he's not trying to win Oscars (when he is, e.g. Schindler's list or Colour Purple or Amistead, etc he's actrocious).
Oh, and Dr Strangelove. Actually, I think that's the only good film ever made. Except for being a bit 'boys only'.