/a/ hivemind claims to hate this anime because it has a lot of faults, i.e., shallow characters, trashy harems, random fanservice, random violence. For some reason they can overlook that in other shows, so when we look a little deeper into the argument, we find that /a/ hivemind probably hates this series because it was a letdown. It started out as an epic violence/horror/incest anime and slowly declined into a crappy harem with some scenes of gore. I still recommend you see it, but keep in mind /a/ is butthurt because some Gaiafags call this simple series deep. Don't go into it with ANY expectations, and you'll be fine.