Well, Facebook and Twitter are currently used in cyberwarfare to destabilise western democracies and the result is pretty impressive, because it works.
Give people their Facebook but remove the algorithms from the timeline and close all groups to make it harder for people to spread misinformation and group together to celebrate it. Or close it all together, social media doesn't have that many upsides. My observation from more than ten years with those tools.
No idea where the problem lies in Twitter but marking tweets with lies and conspiracy stuff is a step in a good direction.
Social media can't not have algorithms for limiting what you get to see, otherwise you'd be swamped with items on your timeline and you'd stop using them. Oh, I see what you're doing. Yes, they should get rid of the algorithms!
Give people their Facebook but remove the algorithms from the timeline and close all groups to make it harder for people to spread misinformation and group together to celebrate it. Or close it all together, social media doesn't have that many upsides. My observation from more than ten years with those tools.
No idea where the problem lies in Twitter but marking tweets with lies and conspiracy stuff is a step in a good direction.