I have had a pretty positive experience with Facebook. Member of several sites and an Admin at a Stephen King Fan Page, Stephen King Central. I enjoy it a lot. The platform is super easy to navigate, chatting and sharing is instant, and many friends from the SKMB are over there too.
While you may run into the occasional friction, that is true of everything in life. Luckily on FB I can adjust my privacy filters to show just what and who I want to see . Sorry OP you had such a bad experience. Hopefully you can learn from it and move forward. There are so many wonderful and interesting people in the world wide web, don't let a bad person ruin possible future friendships. Good luck to you!