Is it just social media eroding people’s brains at amazing speed?

Probaby. I don't want to come off as "grr! social media bad!" because that's not what I mean but it is incredibly easy to switch your main source of news to social media, which then is also incredibly customizable. And since social media companies want you to continue using their site as much as possible to serve you ads, they recommend content similar to what you're already consuming and then it becomes very easy to slide down a rabbit hole into a completely different reality.

I don't even know where to begin on how this could possibly be solved though.