Apparently, not enough, or not forceful enough for a contingent of people to decide to quit the Internet for good. Where are the modern day anti-Internet luddites? Talking about it on a blog or, worse, posting about it on Twitter doesn't count, sorry.
So that's the rub, the people who realize it is horrible actually quit on it. Lots of people talk about getting of social media, but very few actually delete all of their accounts. I've removed every social account I have around four years ago. I still have a HN account, but that's about it. I talk to my family and friends about how dangerous I think social media is to our society if the topic comes up, but frankly not many people want to hear it. If I really pressed, I'd end up being "that guy" who talks too much about any topic.
I really don't think the majority of folks are going to quit social media even if every day the NYTimes, CNN, Fox News, whoever put out news stories on how horrendous it is.
My compromise is I have Facebook and Twitter accounts, but not the apps, so I have to use a browser on my phone to look at them. This means I can still see content, but no notifications and the friction is high. I'd rather go on Youtube and see what people I subscribe to are making videos about.