It's the amateur style that makes the movie more powerful then It's actually Is. It feels more alive and looks more mysterious and out of focus in that way. We are spoonfed with worthless tailored cgi spectacles so when a good movie comes out it feels fresh for some. And they praise the director. Many humans are faulty in that way. I just see it for what it is.
Then the actual setting plays a huge part. A dustblown junker town. The heathwaves and sand that makes the beachside look ominent and poetic. The movie is not without It's problems though. Dialogue is uninteresting. The drama going on until its final reveal is nothing to gasp about. You can allready guess the ending from the foreboding beginning. That's the Main issue with this witchy tale. It really doesn't offer that much suspense.
But It also prooves that you can make a good looking movie with a couple of white lenses and a good setting and a synthscore. Myself I would have thrown in some really spooky or some really exciting moment in the middleway To elevate it. Make it more of a memorable film. I would also get rid of half the score more annoying screeeeeeeeeetsh clinkering bits. Make it even more monochromic and gloomy.