The pharma thing is just Robert Kennedy Jr. nonsense. I also don't believe the Tucker-loves-God-too-much story or the Murdock-kids-want-to-sell stories because if those were the truth, then it would have just been Tucker Carlson alone that was fired. But I understood the facts to be that Carlson and his producer(s) were fired. No need to fire the staff if Carlson alone was the problem.
The suit by the previous show booker isn't merely a hostile work environment sexual harassment suit. She's also alleging that Carlson and his producers suborned perjury by encouraging/threatening her to lie during discovery in the Dominion lawsuit. And she did, in fact, have to amend her depositions in that suit.
Plus, the discovery in the Dominion suit brought forth a lot of Carlson's behind-the-scenes shenanigans that didn't win him any favors with the network, e.g., he regularly called one of the senior executives at FOX a "cunt."