I personally don't believe you have ANY evidence. More plausibly you are acting as a "useful idiot" for traditional media.
Now that Australia has banned social media, are you going to admit you were wrong? Or just double down and ban phones? If something is "unbelievable" then you better have good evidence for believing it, not just narratives.
I'm not sure I follow; are you disputing that social media cause harm to mental health, and particularly in teenagers?