Largely similar to what you have, but abstracting away the metalware and reframing as human-centric.
If the user is at the center, surrounded by more users, making primary & secondary connections, in an approximate circle shape. You can then show traditional social media owners as wedges of that circle, containing (owning) a fraction of the users & preventing connection to others, vs. Fedi that lets you connect to everyone.
I remember watching this in school... as a treat