The actresses were well casted and very good at portraying their desperation for validation from their abusive fathers. The main thing that was bad about this was the ending. The "Lillith" story makes a lot more sense as a mythical motivation for these girls. Her story should have just opened up the girls' eyes to the REAL horrors around them. Instead, she posessed everyone at the end and made it goofy. Lacy's death was ultimately in vain because her father wasn't alive for long enough to suffer that guilt. The ending was bizarrely supernatural and provides no actual conclusion. Are the men dead? Are the girls now demons/followers of demons? Doesn't that just further solidify their fathers' fears? Where are the girls going at the end if not with Lillith? A real, tangible ending would have been more satisfying and told a better story.
Besides that, the story was genuinely good. Purity camps are a real and horrifying thing. Some aren't as extreme as locking girls in cages, but they actually do similar rituals to that. Common practices are wearing all white, wearing locked belts that their fathers hold keys to, and signing contracts saying a girl belongs to her father until she is married to a man her father approves of. The realizations of the girls mirrors real life.
Besides that, the story was genuinely good. Purity camps are a real and horrifying thing. Some aren't as extreme as locking girls in cages, but they actually do similar rituals to that. Common practices are wearing all white, wearing locked belts that their fathers hold keys to, and signing contracts saying a girl belongs to her father until she is married to a man her father approves of. The realizations of the girls mirrors real life.