6.8? Wow.
I don't think anything is a '10', but this is as close as possible to a perfect genre piece. I can't think of a piece of writing that better fit an actor.
Some dialogue is so good, it just makes one want to rewind just to hear the words over and over.
I think people who dislike it should not rate it because it's like judging a football game when one doesn't even enjoy the sport.
But if you like the genre, you cannot dislike this.