Corporate social media sites are always going to follow a trajectory from vaguely progressive, to "free speech" maximizing, to profit maximizing, to state dept goons on the board, with the only off ramp being if the site implodes before it gets successful enough for the goons to notice. They're always going to wind up as a nazi bar with pro-capitalist, pro-imperialist bias.

Decentralized sites instead follow some rando admin's biases. Are the admin's politics any good? Probably not, most people have shit politics. But a cross section of total randos is still a better diversity of political thought than the repeated systematic trimming that corporate sites have.