I thought this film was amazing, but not meant for everyone.
I thought the story was fascinatingly designed. There were many plot twists and devices used. The cinematography was brilliant. The script was amazingly dense and intelligent. The ending was surprising and compassionate.
It's just that it was so gory and hypersexualized. But that was part of the impact of the film.
I'd watch it again, actually. But I'm a gay man. I'm used to seeing a couple of penises and not uncomfortable with on-screen depictions of sexuality (however cannibalistic they were - yuck).
"Otto" is a work of art on many levels. If you disagree, that's cool, but at least have the intelligence to give a rationale.