I don't think you understand the U.S. news market. TV news is provided by Fox, MSNBC, CNN, ABC, CBS, NBC, PBS and then some ancillary players. That doesn't count print. So even some liberals here have pointed out, Fox News might have the largest audience but that is in a fragmented market.
Fox News also seems to receives a lot of attention and hostility because their commentators frequently mock other news outlets for biased coverage. So the partisan nature of cable news is amplified. "How dare they" one might say.
In closing, I will say the 2020 U.S. Presidential election was not stolen..............but, but, but what about........in short, no caveats. See what a correct factual answer looks like.
I agree, the US news is fractured. However, with the ongoing decline of local news sources (which, unfortunately, is happening in Canada as well), many people are getting information from questionable sources. The right-wing media is, obviously, much larger than just Fox. I haven't seen the stats lately, but the top podcasts are right-wing, the talk radio format is heavily skewed to the right wing, and shares on Facebook and other social media (especially now on X), skew right. And, that wouldn't be an issue, per se, but they frequently misreport or pass on lies as if they were facts. But, because of Fox's largeness, they also tend to be the ones who amplify distorted takes, which the other right-wing folks spread. What's the old saying? A lie will be halfway around the world before the truth has its pants on...
And, let's take a look at how Fox amps up bullshit: This morning, on Fox Business (I know, not Fox news...), they had James Comer on talking about how the GOP is concerned that Tim Walz has ties to China, and maybe has been groomed. Now, no reasonable person would think this. But, Comer knows the Fox audience is easily manipulated, so he and Maria Bartilomo talk about it for like four minutes. And, I'm willing to bet this will get some play in the opinion shows at some point (if it hasn't happened already).