Looking for a specific movie on Prime or Netflix?

Look for some kind of horror movie. I saw it on amazon prime or netflix 1-2 years ago but I'm not sure which of the two. The film is started as a kind of documentation by a guy who is somehow an author or something and lives in his residence. The film is structured like an amateur film. I can remember that in the film I think a woman comes in at first. In the end there's something like a kind of blind daredevil in which someone sits on a bench in the distance at a lake and is hit with an ax from behind. Can someone tell me the name please?

Knows which one you mean but unfortunately forgot your name can tell you again when I know it again

Gladly