Who says A Serbian Film didnt happen?
But if your looking for fucked up movies you won't find many on netflix, you have to go to the dredges of the internet, or just deep web to see snuff films.
Shrooms was kinda fucked.
Also, there are always these guys
Charged with 21 murders (all the police could prove) and they were being paid to make 99 videos of each murder, and sending them to a anonymous benefactor.
I have a few of the videos, if interested, just PM me. Warning - Extremly Graphic, and contains footage of REAL people being killed.