SPOILERS AHEAD
I saw your post, and remembered that I wanted to see this. So I decided to go watch and then come back.
Was this movie a blockbuster? No. Did l enjoy it? Yes. I enjoyed the creepiness and how each segment explained the wtfness of who, why or what we just saw. Definitely kept me watching.
Like you, l went in blind (l didn’t read your post when l saw it). I didn’t know it had to do with witchcraft, but enjoyed that it did.
I figured out what was going on with the children before the reveal. And like you, l agree about the set up with the Aunt a little hard to buy into. Come on, no one in the family knew nothing about the Aunt?
Anyway, it wasn’t a bad movie, it was something different. We need more different. Worth a watch. Especially for Julia Garner! I think she’s a gem. I first seen her on Netflix’s Ozark (the series with Jason Bateman). If you haven’t seen that, l highly recommend it. Was good to see Justin Long and Josh Brolin too!