I haven't seen the film but I'm not surprised. One, critics love provocative stuff, especially stuff like this that delves into taboo alternative sex.
But also films like these have the potential to be very interesting. Think about it, if you had to watch either a film like this or a film about a romance between two people in their mid to late 20s, which do you think would be more likely to provide the more unique film experience?
Its like the difference between a film about an African child soldier or another Michael Bay US army commercial like the one about Benghazi. I'd rather watch the former tbh.