I've watched many Carmack videos over the years and he never complained about the team not following him or people working for him being not good enough, he always praised the work done and explained in very fine details why the decisions where taken one way or another.

When he wanted to remove a pebble from his shoe, he talked extensively of the company decisions, in the higher ups, which is more than fair given his role.

He never struck me as a "Steve Jobs of coding" (probably today Elon Musk?).

I also had several encounters with John Romero and talked a bit about the times at id Software and he never ever hinted that Carmack was problematic in any way.

Anyway.

Regardless of the truthfulness of what you write, Carmack has always been able to deliver, both in time and as of code quality and maintainability, one way or another, Meta hasn't.

The evidence pile up more against FB/Meta management than against Carmack, moreover I think it's easy to attack the person taking responsibility in person than those hiding in the shadows, Linus suffered the same destiny, but he created Linux and brought it where it is now, the attackers didn't, so maybe Linus was simply right.