Just one example, but having to be logged in to view most content on there was a recent change that made it pretty hostile to the openness of the web platform.

You can find links to other criticisms of twitter in TFA:

Interop: https://www.eff.org/deeplinks/2021/01/twitter-and-interopera...

Privacy: https://www.eff.org/deeplinks/2020/04/twitter-removes-privac...

https://www.eff.org/deeplinks/2017/08/twitter-and-others-dou...

https://www.eff.org/deeplinks/2019/10/twitter-uninentionally...

Accountability: https://www.eff.org/deeplinks/2015/08/twitter-axes-accountab...

DM encryption: https://www.eff.org/deeplinks/2020/07/after-weeks-hack-it-pa...

All of them, I think?

https://en.wikipedia.org/wiki/Internet_freedom

Banned third party clients and interoperability. Use their software to access your data on their servers, on their terms, or get shut down. Hard to think of anything more anti-internet freedom. I left when they did that, years ago.

They would not be able to enforce it on desktop computers, short of banning every user one-at-a-time, but they can easily blanket-ban it on mobile phones by requesting Apple and Google remove unauthorized third-party clients from their app stores. (Which they will do. Apple even lists unauthorized clients for services controlled by other parties as against the rules. Whatever that means.)