For details see: https://news.ycombinator.com/item?id=45515980
The solution is to ban all server-side ranking, moderation, and filtering mechanisms and replace them with client-side-only solutions, at least for large platforms above a certain user count like X and YouTube. Same thing for search engines and chatbots.
Each person should be able to control what they can post and view online, but not what anyone else posts or views. The norms that we use to moderate physical public spaces must not be applied to online public spaces. Until we discard those norms, people will continue to become increasingly polarized, democracy will continue to decline worldwide, and violent conflicts will continue to increase in frequency and scale.