I cannot understand the low rating...
A 6.1? This makes no sense to me at all. Is it the greatest film ever made? No, but a 6.1? Not at all.
I think this movie works so well because it is SO believable. The acting is excellent and it's a film where you pretty much never have to suspend disbelief. It's so dismal in certain parts and so upsetting that it's flat out uncomfortable. Maybe that's why it has a low rating?
It wasn't me who was murdered, was it?