I think you’re asking for alternative front ends to git, rather than GitHub?
I’m not sure if you want to retain access to Issues, Actions, Discussions and everything else on GitHub, but through another interface. Or if you’re asking to make a clean break from that data and ecosystem.
If it’s the former, then I think it’s either the web app (which you don’t like), or the CLI (gh). If it’s the latter, then I think any of the other options mentioned by others will do.
Facebook is definitely not “fine” when it comes to privacy. It’s less worse than TikTok because it’s an American-based company, so in theory there’s a more accountability compared to TikTok (owned and operated by China).