Shitty interview experience. Should I be petty?

I had a final round interview with Savills as a valuation analyst. This role was advertised as a real estate valuation focused on the UK market. Started with a simple excel test, then a 1st round interview with 2 heads of valuations teams and finally an interview with a German director based in London. I got to the director interview stage and it got really bizarre there. Firstly the guy was trying to be a big asshole, constantly interrupting me and almost never allowing me to answer his questions, at all. For a full hour, he kept talking and rambling about the fact that his team is actually more of an automation and data team than a valuations team. So, the job ad was completely false. It somehow never occurred to them to mention this anywhere throughout the process. I mentioned this to the director and his response was “you should’ve expected this because the excel exercise had a VBA part”. How does this make any sense?

The icing on the cake was towards the end when he condescendingly said that, looking at my CV, he didn’t think we’re actually a good match as my experience in finance (PE & valuation) doesn’t align with his automation team. He said he was surprised that I even passed the first interview and tried to insinuate I must’ve used AI for the VBA exercise. If that’s the case, why the fuck would he invite me for a 1 hour interview? Genuinely the most punchable face I’ve seen in my entire life.

Is this common or normal? I have prepared a long email for him and his team basically trying to tell them the process was waste of time and blatant misrepresentation. Is this an overreaction?