Why are sound tracks so loud that you cannot understand the dialogue?

Just saw the GG award winning movie Social Network". It was horrible we could not understand 95% of the dialogue because the sound track was so loud and overbearing. I understand it was supposed to be a good movie but I have no idea what the heck they were saying. I find this in the majority of movies today. It appears to be more about the music today than the story. If I want to see and hear a musical I will go to a "Musical" movie.