Easy, "Inception." What a godawful movie. No characters, no plot, no dialog, no excitement, pointless action, and everything is read in the flat affect of a soap opera. I could go on, but Mark Twain's essay about the literary offenses of James Fenimore Cooper (http://etext.virginia.edu/railton/projects/rissetto/offense.html) says it better than I can.
My hate of Christopher Nolan extends to "The Dark Knight," which is awful though not quite as awful as "Inception." At least it has characters we already know through better works. But the pacing is leaden, it's easily an hour too long, has gaping plot holes, zero character development, achingly bad dialog, and (again) everything is rendered in soap-operaesque flatness. Go ahead, compare dialog to "General Hospital" or "The Days of Our Lives." You'll find the same flat, creepily unrealistic delivery from characters. It was a painful waste of time, twice. I actually saw it a second time to make sure I wasn't in a bad mood the first time.
Further, it sucks the life out of Batman. Adam West is, and always will be, Batman. Anyone who disagrees should consider that Bob Kane himself worked on the TV show. Obviously, he had a blast writing it and it was always a favorite growing up. Moreover, Eartha Kitt as Catwoman trumps pretty much everything else.
If I haven't taken enough whacks at the hornet's nest, I'll say that Ingmar Bergman was a god among men. Sure, he doesn't cut every four seconds and have idiot action scenes, but he made masterpieces. I get sucked in every time and linger over the cinematography and deep characters.
Further, older movies are generally better. Slower pacing, more dialog, and adult themes. Most movies today are about children in adult bodies. Horribly shallow and simplistic. I also hate that most movies feel the need to put the highest-paid star in every scene. More a business function than art. Older movies have bigger casts and more complexity and variety.
Not everything has to be an art film, though. "Avatar" works, despite being predictable and having goofy dialog. It works because Cameron spent a lot of time on traditional character development - rarely seen these days. Cameron also spent a lot of time on the visuals. There hasn't been a visually richer movie - Pandora is fantastic and beautiful. Between that and having genuine characters, the movie succeeds.