Movies that drag on a story they have established in the 15 minutes

Though this movie is by no means bad, I can't help but feel it's one of those films that drags on for far to long. I could see the story of this movie being told from start to end in 20 minutes as a short film.

I get it. It's a movie about the question of determinism. What kind of lives could I have led. What is time. How do we perceive it. etc. etc.

Other movies that gave me a similar feeling are The Tree of Live and Enter the Void. These movie feel like the result of talented movie directors having to much creative freedom ( I can't believe I'm saying this, but I am ). It's just drags one for to long/

How do you guys feel about this?