I am working on a hypothesis that horror movies suck. Even fans of horror admit that most of the movies suck. To support this idea, I have compiled scores from Rotten Tomatoes . I plotted the movie score vs release year. I wasn't able to get the movie titles on the charts, but you can cross reference the year with the movies listed in Wikipedia. So far, I look at Friday the 13th, Halloween, A Nightmare on Elm Street, and for a comparison Star Trek. I then list what ratio of the movies got a score greater than or equal to 50%
Friday the 13th, 12 movies with 2 greater/equal to 50%, or only 17% of them.
Halloween, 11 movies with 3 greater/equal to 50%, or only 27% of them. Note that this counts the 2018 movie, which probably shouldn't count because it is too new. But even counting it improves the ratio.
A Nightmare on Elm Street, 9 movies with 4 greater/equal to 50%, or only 44% of them.
Star Trek, 13 movies with 9 greater/equal to 50%, or 69% of them.
This preliminary analysis shows that the top 3 horror movie franchises don't even have half their movies with a score over 50%. But Star Trek, a series that is often made fun of, has the majority of its movies with a score greater than 50%.
Further analysis could show score vs year, and the effect of reboots. But for now, I think I make a good case that horror movies suck.