The 3.9 rating
So far this film has 3.9 stars with 45 votes. I think this is because the people who have seen the film and voted are people who downloaded it based on the cover & title expecting a poker movie. There is only one scene with poker being played, the short opening scene. The film is more of a drama/thriller about friends looking for a killer. That's what it's about, NOT poker.
It's a great film as a drama and decent as a thriller. I wouldn't call it very thrilling because it's not dark enough to be effective as a thriller, but the mystery of "who is doing this?" is there as more people in the film die.
If you want a good poker movie, watch something else. See this if you want a good drama.