Think about it this way: Why would you want to go to an event where the organizers were too lazy to even invite you? I’d say you lucked out and whatever else you were doing at the time was likely more valuable.

I’ve been off of Facebook for a decade and still have a robust, satisfying social life. My real friends know how to contact me and I never feel left out of the actual important stuff going on. I think of Facebook’s existence as a blessing: it allows me to easily filter out all those low-effort “events” run by people who don’t really care if I come.