Lot of solutions on offer. But IMHO, only one thing will fix it. Forcing it to open its protocol. A mail++ (for social) which will just allow all the products to compete in the open. They can compete on UI, the feed sort algorithm etc, among other things. Nobody will hate on Facebook as much. Its market cap will go down, but Zuck can sleep better.[1]
[1] “I don’t think he sleeps well at night,” from https://www.wired.com/story/inside-facebook-mark-zuckerberg-...