Ask HN: Is there any social network you trust?

There's nothing that can fill everything that Facebook offers, with the most important part being your friends will probably not use whatever you choose, even if it's only to keep in touch with you. If you're looking for a Messenger replacement to keep in touch with your social graph, you can try Telegram, Wire, or even Signal (if you're adventurous and want to piss of some friends). There are also several Twitter replacements, with Mastodon being a major one (decentralized, free).