Why do this movie get very low review point

I've watched this movie 2 times in just 1 week and still enjoyed a lot. Great performances, artful script, good music...What can the audience demand more? So why is it rated just 6.5. I think at least it must be 7.5.

Also, performances of Logan and Rene are too great. Logan is talented and versatile. Watching this film and The Perks Of Being A Wallflower, what's a surprise. Hope he will get an academy nomination soon. About Rene, nothing to say, she's always too good. I love all her performances in Chicago, Cold Mountain and now in this film.

Hope some one comes and share your idea with me. I think this film is far better than a bunch of craps outside.