I hated watching it and would never recommend it to anyone unless they really want to watch a movie about Serbia since the director's intent was to make a film that captures the experience of living in Serbia. Admittedly that does elevate it artistically but it still isn't easy to watch.
I have made jokes that the movie Spongebob: Sponge out of Water is just as much a movie about the Spongebob franchise as a whole as A Serbian Film is about Serbia.