Do you abruptly cut the interview short or do you just make a mental note and continue?
Usually after this, I take some time just to 'calm down' and think about it, and I usually shoot them an email saying that I appreciate the time and opportunity, but I don't think it will be a good match and wish them luck finding a better suited candidate. I had a few replies thanking me, most just don't reply and I had one (only one) insulting me and my experience and saying they only interviewed me out of pity as my experience wasn't good enough (I had more years (8) of experience in the tech stack they used than the number of years the company existed!:)) Was from a Who's Hiring thread here actually :)
I LOVE sending letters like this. It's the politest middle finger you can give to a douchey hiring manager or organization.
I don't have so much experience interacting with recruiters/hiring managers. However, every time I've let some frustration show at work, in the moment I felt vindicated and righteous, only to feel like an ass about 24 hours later. Normally when I feel the need to vocalize a frustration, I try to write down or remember why I'm frustrated, but wait to actually action the communication until I'm calm. Goes a long way to focus on solving problems, without identifying people as the problem.