where can i watch horror movies?

A good free place is on tubi, if you like crappy low budget horror movies like I do you'll like it, just find an ad blocker to get buy the ads, and its a great free streaming service

I second Tubi, low budget horror movies are my personal fav and, unless I want something specific, that's where I go.

Get a VCR at your local pawn shop or second hand store for $5, get some tapes off ebay, and get the cheapest CRT you can find on Facebook Marketplace.

Watch whatever you're watching alone, with your phone off, in the middle of the night.

If you feel so inclined, get some blank tapes, an HDMI to RCA converter, and the appropriate cables and bootleg some movies onto the tapes, then just watch the tapes.

This is the proper way to watch all horror movies, and this is a hill that I'll gladly die on.

As for where to find them, there are a variety of websites hosted in parts of the world that don't care about copyright laws that you can find with a few searches - I just recommend using a browser with adblockers and pop up blockers, or extensions that do this like ublock origin.