The old social media was at its simplest a chronological feed from the friends, you wanted to see.

If I want to add personalization I could add a algorithm to do that, only so that it promotes my wellbeing.

It really shouldn't be this difficult.

Instagram (at least in europe) already provides this feature as they have to. Problem is you need to specifically adjust your feed every time you open the app, which makes it kind of useless against the addictive nature of it.

Neutral social backend/API and a local client with the algorithm I've customized.

Or something like that.