What would you suggest if you were helping design a healthier social network?

For example, would removing infinite scrolling help make it less addictive? Would you keep the upvote/downvote system, remove it, or classify posts differently to foster better discussions? How about adding a countdown timer to log the user out after a certain number of hours of use?

If psychological research can be used to keep users engaged on a social network for as long as possible, I believe it can also be applied to help prevent excessive use, improve the quality of discussions, and create a more empathetic environment. That’s why I’d love to hear suggestions from those in the field.