The horror genre is certainly not the place for happy or decent endings. It's proven to be the home of brutal endings time and time again. However, the idea of a horror movie having a happy or good ending isn't impossible. There are plenty of horror movies with perfect conclusions, including films like Thirteen Ghosts, The Babadook, and Get Out, to name a few. There tend to be more horror movies with jaw-dropping endings like The Descent.
Source：https://www.cbr.com/horror-franchises-good-ending/
