See it in the theater, while you still can
It is a decent horror film. The audience does not know exactly what is going on for a while. So a feeling of dread builds as we go along.
I suspect that about 15 minutes might have been cut to make it a tighter story. We got hints of a back story for the teacher and her cop brother. It wasn't really explained and they should have cut that out entirely. They probably could have added five or 10 minutes before the climax. It's too bad that they did not have more money to market this. More theaters might have carried it in the USA.
I sat through the first 20 minutes of Dune Part I (2021) on a huge IMAX-sized screen. It was so boring that I walked out to a smaller theater to see this instead. Good move! I have HBO-Max so I can resume Dune there... if I have trouble falling asleep. Antlers is nice little horror film, worth seeing.