If we start listening to IMDb to our go to guide for quality movies then we have lost. I rated this a 7 and if you look at the voting breakdown a lot of people also gave this a 7. As an average a 5.7 isn't too bad.
There are alot of people that don't even watch a movie and just rate it a 1 for spite. Maybe they don't like an actor or there's an issue with something trivial in the film and BOOM! - a rating of 1.
I strongly believe 1's and 10's shouldn't be thrown around with ease. I rate a 1 ONLY on the worst of the worst and a 10 on the best of the best. In my voting history I barely have any 1's and 10's as ratings because simply put - most movies don't deserve these extremes.
On just about every board on IMDb there is a question of why a movie is rated so high or so low. The real reason behind this is because 50% or so of people that rate movies aren't rating them properly or are too young to have seen enough movies to have a well rounded opinion.

yeah..even i think it desrved a 7.2 or something..
All Time Favoutite Movies : Schindler's List and Diarios de Motocicleta