I am not a fan of flashbacks. I thought the way they were done here, with different sections shown as small snapshots, is about as palatable as it's going to get, but I think the technique itself is mostly terrible.
I thought the vagueness of the conspiracy added to its threat, although leaving it that undefined also leaves it up to the viewer as to whether they find it more threatening or less.
Dialogue was hard to hear, in the kitchen and at the end especially.
I really appreciated the way a lot of it was almost glossed over, while still giving you an unwavering look at the awful side of what resulted. It was almost True Detective-esque in places.