Hmmm... there's this thing we've been doing that's been costing almost our entire industry customers/consumers and we're all in decline. The few exceptions like Fox and the WSJ at least to some extent are doing the opposite...
I KNOW! LET'S DO WHAT WE'VE BEEN DOING HARDER!
The media on both sides are businesses. Honest, well reasoned, non-inflammatory content does not generate views, clicks and eyeballs. The modern business environment is driving more and more inflammatory content and conduct. Fox has LONG had a low reputation for accurate news. Even most Rightists would admit that, they just don't see that part as important as it not being so over the top Leftist as most other services. Substantially more Leftists than Rightists go into journalism, often ones that are pretty far left. Give it a couple decades, and you have our current ecosystem.
A lot of people believe Fox is ueber wonderful and that's why it's successful. Which isn't the case. Fox News is pretty junk stuff, but they're not facing any substantial opposition. If you had a half dozen major competitors, they'd be in the middle of the pack at best. The more numerous Leftist networks have a much more competitive environment. They're fighting for the attention in a field with a lot of competition. Hence why you will continue to see their journalists do weirder and wackier stuff. There's a half dozen times as much pressure as Rightist journalists are facing. Both sides have around 40% of the country that would maybe voluntarily watch their services. The rightists are slicing up that pie into much fewer portions.
An interesting exercise for folks here...
What can mainstream Leftist news entities DO with the eroding industry due to economic pressures and competition with the internet? (Skip the standard "they can join the correct side, by which I mean my own" answer)