Is that supposed to be sarcasm?

Check out c/[email protected], they have some software recommendations for degoogling.

Since you have a Pixel you should be able to install GrapheneOS, which removes a lot of Google services and is a lot more secure.

I would also recommend FreeTube, which is ad-free and has the feature to download videos like YT premium. You can even import your subscriptions.

Welcome to the rabbit hole of degoogling.

Not federated, but definitely anonymous. All Signal messages are E2EE, and Signal can’t even access your messages. They literally have a page where they list every time they’ve been asked by the government to give info, and they can’t. https://signal.org/bigbrother/

Right in the Signal box, it says “Or Matrix/XMPP”. It’s super tiny for some reason.