Barr didn't want Cippolone or Wray fired, so he's probably got a hair across his ass now that Cippolone got the boot.
Now Barr has no pull; can't negotiate deals. Flynn has taken over. He's of no use to anyone, so he ight as well get a few cheap shots in on his way out, hoping he convince anti-Trump MSM to give him plenty of appearances.
He'll take over Neville Chamberlain's spot as the most clueless asshole of all time by the time Trump is finished with him.