I think we’ve got a stopped clock situation here. I don’t really think he’s entirely wrong, do you? Fox is open about the fact that they’re decisively tank for the Republicans. I don’t think other networks are exactly in the tank for Democrats, but they have issue biases that add up to the same thing (which is OK with me).
What we don’t see any network doing is admitting they have a bias, and explaining how they will correct for it. CNN doesn’t admit bias at all. Fox does, but won’t admit it’s something to remedy. I wish we did have a major media outlet that admitted a liberal bias, and then tried to openly hedge against it. It would have to be a valid hedge, not a both-sides crusade that lets idiots spread propaganda, and not a strawman-punching-fest.
Of course you are 100% correct that Fox is different because they lie and fabricate prolifically, and give airtime to truly nutso individuals, and pander to the lowest white grievance politics. There’s bias, and then there’s being a propaganda mouthpiece for demagogues. Fox is absolutely an exceptionally warm turd in this regard.