Wasn't Zuck's idea quite the opposite to make Instagram for Kids safer for children by filtering predatory, malicious and disturbing content that might affect them at that young age.
So even if Facebook succeeds in removing all predatory, malicious and disturbing content, are they going to eliminate all of the above from Zuck's kiddy-insta?
I see absolutely no reason why kids should be any different than grown-ups in this regard. Quite the opposite. Kids are absolutely obsessed with comparing themselves to other kids, and Zuck's Kiddy-insta is an absolute recipe for disaster.
I think the trend of hyper self-centric content begun with Instagram indeed. For example Photo Models and Body Builders sharing photos of their bodies for no apparent reason besides to glorify and/or sell themselves.
Photos of food make no sense to me, photos of pets I can somehow understand and yes I can understand how looking at happy lives and happy experiences can make you feel miserable but then again Facebook or Instagram don't really know your mental health and state you are in and can not magically remove "sensitive" content that would disturb you.
Best thing would be to stop using social media altogether or use it only to inform yourself about the world around you but in the form of text or perhaps audio/voice only.