It's not a new thing. The same issues were the case for television, radio, and newspapers. They had to teach media literacy before the internet too. You go back into the archives and you'll see some wild misinformation that's very reminiscent of what we see on the internet. We did have a brief few decades where we had a more consistent and adhered to set of standards, but these were by no means universal. The perception of reliable information is also skewed the combination of being less aware of misinformation when younger and by a unique period where mass reputable media were all saying the same thing... But that also meant they were leaving the same things out.

But the internet did change things. Standards have been blown up, misinformation is much faster and the volume of it is much higher. Our brains couldn't keep up with 24hr news channels, let alone the cesspools of social media we have now.