I'm pretty sceptical of the idea that social media has ruined kids' mental health, and this went beyond the abstracts of the papers usually invoked in favour of that thesis and suggests that the argument is weaker than it looks. IMO, the most plausible cause, if there is a connection, is lost sleep.
Don’t panic about social media harming your child’s mental health – the evidence is weak
We’re told the internet destroys children’s mental health - but Stuart Ritchie read all the relevant studies and saw little to support the claim
inews.co.uk