Maybe it was the modern setting, but I didn't get a VVitch vibe from it at all. The Witch immediately kills the baby, there was no development there. Then when the brother dies, it's much later, with nothing suspenseful in between. Just him listing after his sister's titties. If you were to watch that movie free of any marketing, you'd have zero idea it was billed as horror.
That said, this movie was NOT marketed properly. Audiences clearly anticipated a horror flick and got a 2 hour misery filled family drama mystery with 20 minutes of unbridled terror.
I was not referring to it being similar to The Witch in narrative, more that stylistically it's the similar. It's a different type of horror than most mass audiences are used to, so it'll likely piss off general movie goers who see it.
I would put it in the same stylistic house as The Babadook, The Wtich, and The Invitation.