There used to be a guy who posted here some years ago who always posted stories from right-wing news sources trying to get people outraged about something that liberals or democrats did or something along those lines. Nearly every single story that he posted was easily debunked, maybe even every single story, and that was something that was easy to do, and something I did when I had more time to indulge in this BS. All I had to do was look for the source of the story- there never was one, or the source was extremely flaky or wildly exaggerated. Conservative news has no credibility for good reasons.
Many of the sources that you think is somehow "leftist" like CNN (insane that CNN could ever be considered leftist) has to meet a much higher standard of journalism than pretty much every conservative news company. Many of their reporters and editorial staff have degrees from Northwestern or Columbia NY or other top journalism schools. They are extensively trained for accurate reporting. There is no corresponding culture for accurate reportage in conservative news. Many of their reporters are communications majors who interned for some republican politician. Some of them at Foxnews are fished out of local networks who were deemed to be "ideologically compatible" i.e., willing to spout BS for a bigger paycheck.
I have my problems with many major news sources, but even a news outlet as trashy as CNN is incomparably more dependable in the raw facts of their story than any conservative news organization. Hell, any article that I write for Audioholics is going to be much more reliable than any conservative news. I bother to get my facts vetted before going to print and make a real effort to ensure that everything I write is correct. I wish I could be as lazy and sloppy as Newsmax or Foxnews. It would be so much easier to just make up BS around something I read in Pravda and never having to worry about anyone attacking my integrity. I would say the reason why conservative "news" don't really have any journalistic ethics is because they know that their target audience don't really care about the truth either. Hence the reason why they think Donald Trump won the 2020 election and COVID vaccines are Chinese mind-control nanobots.