I think it's worth reflecting on how you deradicalise people at this point.
You can't do it by being confrontational. It has the opposite effect. You have to do it drip, by drip and let people come to their own conclusions based on their values.
What you can do is stress other people's 'scared values', so that they notice and focus on those and how a cultish behaviour goes against that.
They need room to come to this realisation, on their own terms.
Unfortunately this means if you call Maugham names on social media at this point, you run the risk of him withdrawing back to wokeness.
Instead you effectively have to go "Yes isn't comprehensive structural governance across all areas really important. If they've failed in an areas where the CEO is supposed to be skilled, perhaps there are governance issues throughout the charity?" Then flutter your eyelids, pretend your fucking stupid whilst pointing him vaguely in the right direction.
It's incredibly frustrating and annoying, but a pile on criticising him isn't going to help at this point. Instead being nice, friendly and going almost 'oh aren't you so clever, how about you look at this too and see if you can see any problems in this area?' is how to play it.
It fucking hurts to do it like this, but its pretty much how deradicalising works cos humans are contrary and don't respond well to being told' oh you, you've behaved like a spineless, sexist twat' and don't tend to change entrenched opinions easily unless given the latitude to do so freely.
I don't like it, but that's how it is.