I've been an IT consultant to 2x recruitment agencies in the past so can confirm with an n+2 confidence that at least some agencies mistreat their recruitment staff in ways that would shock even the most sociopathic sweat shop owner. Think high pressure sales tactics and the almost daily threat directly hurled across the office for recruiter X or Y to 'meet their targets or GTFO'. Fortunately I was a freelancer but I…
I don't think that's off topic at all. I agree that you really did dodge a bullet. For an interviewer to treat you with such disrespect over something which is so trivial and inconsequential is an immediate red flag. The purpose of an interview is not just to assess, but to sell the role to the candidate. "Negging" is an antagonistic interaction which is utterly inappropriate for the professional environment.