I’m pretty skeptical it will come to this. But I think TPM Reader TB makes a good point that is worth keeping an eye on.
I can’t avoid the conclusion that Barr will now inevitably be fired because (as you have pointed out) Trump sees everything through the lens of a domination ritual, and Barr attempted to be the dom on TV just now by saying it’s impossible for him to do his job with Trump’s constant tweeting. The commentary about how Barr just wants Trump to shut up so he can keep doing corrupt things for Trump with a veneer of legality or acceptability is irrelevant, is too complex a thought for Trump, and is not a game that Trump has the patience to play. Trump must win every domination ritual, and the only way to reestablish dominance in this situation is to fire Barr. My guess is it will happen after a period of weeks.