Backrooms
You don't understand how awesome it is for something that originated as a YouTube web series to be made into a fully funded theatrical film from A24. A lot of people have issues with the slow-paced psychological aspects of it and the fact there isn't any definitive conclusion, but that goes directly against what the Backrooms as a concept is. They perfectly nailed the liminal horror and constant sense of dread and confusion.
I will admit it was surprising to see the entities presented the way they were, more so because I wasn't expecting it rather than because it was bad. The found-footage segments felt so nostalgic to the Kane Parsons series. There was a fear that they'd change things too much, but there was absolutely nothing disappointing about it to me.
The way Clark is presented also provides a very interesting character breakdown and offers a look at how the Backrooms can manipulate people mentally, whilst acting as a subconscious graveyard for the victims who fall into it. The lack of clear answers and definitive explanations only adds to that feeling of unease. Yeah it doesn't really "go" anywhere, yet it's terrifying and does EXACTLY what it needed to do. This along with Obsession truly shows the power of the horror genre.