If Kurvitz was such a shitty boss, the team should have gotten on very well and been very productive in the time he was burnt out and absent.
So what great leaps and bounds did they make in that time?
They made Final Cut (with little input from the credited lead).
This was also the Covid era where productivity dropped across the board. Though in Robert's case, the productivity apparently dropped to 0.
According to the second-interviewed guy in that vid, at least the political faction quests were already outlined (by the whole team including him) before his leave of absence. I wonder how much else of Final Cut had already been sketched out? It's a good test, but I suppose difficult to verify publicly. Only those in the team will know if life improved with Kurvitz' absence or not.
I don't think it's necessarily bad leadership to be curt with your team, but it might be bad leadership not to notice that your team is getting pissed off with your attitude. I mean, I generally think that in a lot of professional circumstances, the team is working on comparative advantage, which means the the top two or three people could probably do the whole thing if they put their mind to it, and probably do it better than any of the rest of the team, but tasks are delegated so that they can do what they do
best even better (in Kurvitz' case, world-build, write dialogues, etc.). At least, that's how it goes theoretically. In the real world, most teams have a good deal of human ballast, with most of the real work being done by a few (sometimes rewarded, sometimes not, for that extra contribution). (In the real world also, teams are best when they're all-male, precisely so that emotional nonsense doesn't come into it. One can't say for sure, of course, but just by past experience, the woman is probably the nigger in the woodpile

It is NEVER a good idea to mix business with pleasure.)