Yeah, it's been a sharp shift, as someone who've watched/read Fox News (and other news of course) for decades out of the US. Fox News always been a bit strange with it's vitriol, but at one point, I can't remember if it was around the middle of Obama's second term, or later, but it took a really sharp turn further into emotional reporting and partisanship. Again, Fox always been a bit special, and other news channels also did similar turns further into their sides, but I can remember seeing the change as it was happening.
There is another documentary I quite liked in similar vein but on an individual level, called "Dear Kelly", that follows a far-right conspiracy theorist and tries to give some understanding into Kelly's struggles and radicalization. Released independently and can be found here: https://www.dearkellyfilm.com/
The crime by Fox News is not that they presented a viewpoint, but that they did so at scale, in a knowingly disingenuous manner, to derive financial benefit, for decades.
The other children are also cowards for not taking the legal fight over the inheritance of Fox equity to the limit.