CNN was not in the beginning. They were a scrappy news channel that came to prominence with real reporting (most notably in the Iraq war). They got corrupted once it was clear they could not be ignored.
News sources have probably always had bias, but it was never such blatant characature back in the day.
https://www.youtube.com/watch?v=fHKiVkeup2o
Never mind, I got mixed up, you're talking about just CNN.
CNN has long been a mix of news and opinion, like all news media ever. That’s why media exists: to push facts and interpretations of those facts.
Media is not a charity: William Randolph Hearst and Ted Turner want something for their money: they want to control the narrative.
It has always been blatant: you just haven’t been paying attention. Hearst started a war! He was such a reviled figure that one of the greatest movies ever made was made to dunk on him.
I remember when Clinton tried to attack claimed al Qaeda infrastructure after the embassy bombings and made a speech about bin Laden (the first time I heard the name) they asked if it was to distract from Monica. Compared it to the film Wag the Dog.
Switch to the commercial channels (we thankfully don't have major 24 hour news channels) and the news on there has much more er, Personalities, quirkiness, some silly background news, and a weatherman that travels the country to visit events and petting zoos and shit.
The trick is paying attention long enough to determine if sources stay consistent, issue proper corrections & retractions, are intellectually honest, etc.
Or if the purveyors are just hacking ratings, for more ad revenue.
In the 80s, I eschewed a career in broadcast media. I loved the gear, doing creative stuff, working in the studio. But absolutely hated the business. "If it bleeds, it leads."
We've been complaining about outrage engines since the beginning. Social media just made things much much worse.
Yep, even Fox has some 'real' news a few times a day. Or at least they did until Sheppard Smith quit.