Is there another OAuth identity provider they should use? I agree that it’s ludicrous that advertising companies are the primary identity providers we use, but I have no issue with GitHub / Microsoft as an identity provider.
At the end of the day they could create their own account system and take on the liability of storing passwords, but why? That’s not what their software is about and as instance admins it will take away their time and focus.
At the end of the day I think what you’re chafing against is not their fault but a fundamental problem with open source software at the moment, we have no system of decentralized identity verification, and identity verification is basically a necessary part of ensuring your system isn’t abused.