This is like saying if you don't like the rules you can build your own multinational telephone network. There's a reason telecoms are subject to common carrier rules and I don't see why tech monopolies should be any different.
Somehow now this is bad... Ridiculous.
Let me ask you this: do you think Apple should be allowed to ban whoever they want from their platform justified by them being a private company? If you say no, then you should also say no to Facebook being allowed to do so. Otherwise you're just twisting the facts to support your political position.
This can't happen to utility monopolies:
https://www.theguardian.com/media/2021/oct/06/telegram-says-...
If your claim were true, everyone would just be stuck suffering and beholden to Facebook's ability to fix their service for lack of options.
hardly.