I had a similar thing where they were going through my code from a takehome.

It was with an architect and a lead developer and the architect was really rubbing me up the wrong way. Stupid nitpicks that were all style preferences. Not at all talking about the actual code. I start pushing back and he starts getting a bit combative, which sets me off a bit too as these were the days jobs were plentiful.

At some point he offhandedly mentioned I didn't need a particular line of code in the startup config. So I say, "Yes, that's required, it initializes the routing". He quips back, "No, that line's not necessary at all, you don't need it". The lead dev is looking completely exasperated at the architect at this point.

I paused, started a screen share. Went to the line. Commented it out. Ran the program and it fell over.

I then said, "I'm not interested in working with you, thanks for your time, bye"