My ideals are left lib, and I hope that social structure becomes feasible beyond small populations in the future. That said, leftism is centralized economics. And if you centralize that, you wind up with authoritarianism.
I hope trustless and decentralized protocols make up for the inefficiencies in the long run, we're just starting to see technology catch up to make up for the inefficiencies of decentralized economics
No one, there are already plenty of protocols defined for distributed computing and are made open source. In a hypothetical lib left social network, If you want different networks, that's fine, you just have to make your own protocol. It's like how countries shouldn't have borders, or how computing platforms shouldn't lock you in or out of others (take apple/Mac OS as an example, versus Linux)
Then it's up to individuals to verify the source code and choose to be a node operator. Not everyone needs to be a node operator, just enough on that the common skilled worker can partake should they need to
If you don't like the "rules of governance" of whatever network you're in, that's fine, go to a different one you do like, or make your own with your own rules. If it's actually a better system of "decentralized digital government", you'll attract people into your Network.
Consumer grade tech is more than capable of achieving this. You don't need cpus with 2nm transistors (which are heavily gatekept by oligarchs), there's plenty of open software and hardware protocols/designs to prove not only this concept works, but has been done before by now.
The only problem in the past was with solving the identity problem and preventing Sybil attacks, but that's becoming less of a concern for other reasons (which I could elaborate further on)