Actual question: am I missing something? I get that facebook is big and powerful, and way too many people use it for their own good, but I'm sitting here talking to a bunch of people on another platform right now. A large chunk of which (probably) don't use facebook after recent events. Maybe it's just because I haven't had facebook in well over 5 years, but I don't see them as a monopoly on anything at all.

Everyone has thousands of choices on how to share their data if they don't want to use facebook/instagram/whatsapp. Does the mere fact that they don't use those other choices make the 1 choice a monopoly?