I agree. It's not right, but sometimes people fight dirty.
What I find interesting, and VERY telling, are the different reactions after the 'bombs' were dropped throughout the night. Beth apologized immediately after her anxiety comment, of course validating Randall's peeved feelings and facilitating him departing in a self righteous huff. Randall, however, unless I missed it, has YET to apologize for insulting both Beth and her students. His response after she turned up at the dinner (meaning he had got his way) was to say "I went off, I wasn't my best self, I'd appreciate it if you deleted the message." Sir, WHERE is the apology?
And to deny he was steamrolling her, even when she had the receipts? Even when she listed out a mere handful of the many times she has bent over backwards to give him whatever the hell he was demanding time and time again? He just CANNOT stop trying to gaslight her. I don't think he can even help himself. He has been raised to believe he's the center of the universe and that everyone is here to make sure everything comes up Randall. He can't even see what he's doing wrong.
I had to laugh at his parting shot: "I don't want to be in this house with you right now." Well good, because didn't she TELL you to sleep in Philly in the first place because she can't stand your face right now either? So now it's YOUR idea? Once again, boy BYE.