I have a 13 year old who just got a phone. I do not think things are as hopeless as you seem to believe. My daughter mocks social media (including my own use of it) and, so far, wants no part of it. That is, I think, largely because her mother and I have been educating her since she could use a computer on how stupid and vapid social media is. As far as I know, none of her friends has any social media accounts either, I believe for similar reasons.
I don't know about that. I have teenagers (boys, though) who has no interest in social medial or alcohol. In many ways they're far more sensible than I was at their age.