Ari Aster must have strange nightmares. First there was "Heredity" that deals with a cult with death as a transformational pathway to redemption (of sorts) and now, uh, this.
Lots of talking among characters who are not particularly attractive from a behavioral point of view. Some sex and some violence, but even those are weird. For me, the best way this flick worked was as an allegory for socialism/communism.
SPOILER ALERT--Orders/traditions must be followed, sacrifice for the state is key and individualism and freedom don't exist.