Yeah, check out Kichiku. It's a bit slow going at first but it gets good.
Another movie that deeply troubled me was the last 30 minutes or so of Visions of Suffering. Some of it was laughable, as it's easily the most insane movie ever, only because they used every vst plugin, weird effect, etc etc etc ever to make the movie. So, the whole thing is this artificial world. But at the end, when a gigantic 3D scythe cuts a guy's balls out and then a weird metal pipe cleaner monster enters a guy's brain in crude stop motion and then goes into a pipe and like mates with another metal pipe cleaner worm thing or something to this weird metallic music...
I dunno, just a hard movie to watch.
Pretty much any movie released by UNEARTHED FILMS is pretty disturbing, really.