This might sound like a troll answer, but frankly I'm still astonished and horrified by the prevalence social media has on the internet. To put this in perspective, the advent of Myspace occured when I was still fairly young. I thought the idea was stupid, and a fad that would pass. In Myspace's case, it was. The fad passed, people my age stopped using it, and the site slowly faded into obscurity.
Then Facebook and Twitter came into existence. I know Facebook technically predates it by about a year or two, but both sites became fairly popular around the same time. I associated both with younger kids and spastics. For some reason, as time went on, both of these websites became universal, to the point where you were considered weird if you didn't have one.
If you're still not following me on this, imagine instead of a website it was some other really stupid childish fad. Like, suddenly one year all the kids are wearing short shorts that show off their ass. And then the next year it becomes normal for adults to do so, and eventually old people are doing it. And in your day to day life you find yourself interacting with people like your boss, your coworkers, your politicans, and your family members all with their big hairy asses and wrinkly legs sticking out for the world to see, even in the winter time.
You'd rightfully think you'd gone completely fucking insane, and that is honestly how I feel to this day. Like I fell into some kind of deranged alternate universe where this random fad with no practical value that is fundamentally detrimental to human health just completely took over the world. And nobody questions it.