Seconded (well it is "disgusting" - mainly in concept - but shit, the people who allegedly vomited in / walked out of the cinemas are pussies). All around boring movie.
RE: Srpski Film - having seen it, I kind of can't see what type of person it was made for (aside from "the curios", obviously). If you think the kind of stuff that's clearly in it is disgusting, it'll probably make you feel like shit / turn it off and you won't like it.
If you for some reason truly aren't that bothered by that kind of stuff OR are kind of "desensitized" already, well... Then it won't do what it's supposed to do properly. :/
I will say the acting was unexpectedly good (no idea whether not knowing Serbian affects that judgement) but I can't see a reason to recommend it to anyone. Maybe it has some bla bla deep meaning in it somewhere but bleh...