In some spaces the moral panic has moved beyond social media and now it’s about short form video. Ironically you can find this panic spreading on social media.
Likewise in few generations we hopefully find a way to transfer the cost in medical bills of mental health caused by these companies to be paid by those companies in taxes, like we did with tobacco. At this point using these apps is hopefully seen to be as lame as smoking is today.
For the US, would it be accurate to put "sex" on there as well?
In the past there has been stupid regulations on what consenting adults (of the same sex for instance) could do together. This created a system where group A could get married and were lauded, while the group B went to jail. I am not saying all laws and regulations are good, but we absolutely do need them, and we need to make them just and good. For instance, today we protect the group B’s rights to marry and love with laws.
And the US seem to be trying to spread its level of um... "prudish"-ness to any country it feels isn't as anti-sex?
The VISA and Mastercard + Steam kerfuffle recently seems like that kind of thing, but there are heaps of instances in that set historically.
Social media seems far more dangerous and harder to control because of the power it grants its "friends". It'll be much harder to moderate than anything else you mentioned.
Society did not collapse. That does not mean those things did not have negative effects on society.