Facebook the web site reminds me of a really bad implementation of MySpace. MySpace was better, even in 2003. There are hundreds of usability bugs that exist on various parts of the platform that for over a decade remain unfixed. For a company that has 78,000 employees, you would think one of them might want to dig in and fix the web interface bugs. What's weird is in the age of Claude Code, it would probably take one software engineer a week to fix all of them, so its really pure incompetence. I think they spend more time on automation around restricting the usage of the platform that they forgot about the user interface bugs that plague it.
Also, avoid using Meta Pay aka Facebook Payments, where a user can send a payment to another user via the Messenger app. Someone sent me money a few weeks ago, and a two weeks alter they still have the payment marked as "Completed" on the sending side, and "Cancelled" on the receiving side. I told the sender to just do a chargeback with their bank because Facebook basically stole the money. Don't use Meta Pay for sending payments to anyone. Then when you try to open a "case" about it, you call a call center in Indonesia and the people have no access to see anything about the transaction, they just send it up the chain, only to have an automated response telling you to do something that the web site doesn't even offer as an option. I don't think there is any humans in the loop, besides the Indonesian call center that has no access to any of what you're calling about.
What come to the UI bugs, I don’t think the users was never really in their focus in the sense of usability. Users are there only to make profit.