I didn't like this movie

I usually like humanist stories, but this movie really didn't touch me. I liked the acting, what I didn't like was the screenplay and the direction. There were moments where I was sure it was adapted from a theater play, but I haven't found any reference to it. Bruce was unbearably pusillanimous and Marie was extremely obnoxious, there were no communication at all during the film, they didn't hear what the other said, and while I think this is a good point regarding what many relationships must be like, I think it was so exaggerated that left nothing but a caricature of a relationship, "I've never loved you" "okay darling, let's eat some dessert", what was that???... why don't they just split up???... it really didn't get to me, nor in an intellectual level, nor in an emotional level, maybe is because I'm not married???... maybe is because I'm still young???... I really felt almost nothing but contempt for the characters, I really didn't get the point!!!... I liked the scene where Bruce tries to hit on the girl but then decides he rather masturbate. If you really liked this movie, I would like to try to understand, care to explain???...