Zoomers are the first generation with nearly unrestricted access to social media essentially from birth (access that probably should've been restricted early on, but that's water under the bridge). Couple that early and frequent exposure with artificial echo chambers created by apps to boost engagement, and impressionable minds end up soaked in endlessly-amplified negative perspectives.
The test case for this was 4chan incubating incel/redpill culture and Reddit later amplifying it among late-millennials. Today, EDs, ideation of self harm, etc are all mercilessly reflected back at people on just about every social media platform rather than just the niche ones. The pandemic only made it worse by preventing people from spending time with each other in person, but kids are glued to their phones anyway.
$1 Bet: millennial parents will probably learn from this with their own kids. Or if not, legislators probably will. Late Gen-α and the generation that follows will hopefully see a rebound from these trends with parenting habits that benefit from these learnings.