*spoilers ahead*
Tbh this wasn't good at all. I cant see why others are rating it so highly. I've seen tons of horror movies, including slow paced ones, and most were way better than this. Nothing is explained and it has no real plot.
Tons of things go unanswered, like the cabin in the woods and the person who stayed there was talked about briefly and then never talked about again. We still don't really know where she went those three days she was gone.
I get its a metaphor for dementia or whatever but that doesn't mean it's good, literally all it accomplished in the end was saying "dementia bad" and then it ended. No resolution, no explanation. Just "dementia is bad". We all already know that!