It was a movie I watched about a year and a half ago. It couldn't have been too old, maybe the past 5 years or so. It was a lower budget film about a compound in the desert (I think Nevada) where this community of humans lived ruled by a big CGI purple tentacled alien. The alien would have a ceremony when the kids came of age, and lay a parasite egg inside them. This movie was freaky y'all. Anyways I remember the alien having a telepathic link with the boy after the alien "insertion" scene, but he ended up rejecting the parasite during the ceremony. I remembered they called humans having sex "war" and the aliens would murder the mothers if they got pregnant. I also remember a scene with the kids' parents where they all go to the garden to die, and then their faces grow out of the ground. It's a big reveal later on in the movie.
Sorry, strange movie I know. I just can't find anything about it. The cover has a kid in his underwear with a gas mask on it.