Ok let's be charitable here. Being confused by terminology is definitely not unheard-of. I don't know how well established these terms are, but it is true that in some fields "quasi" used in some way similar to "pseudo" or "lesser". If the interviewer previously studied these as PRNG instead of QRNG, I doubt that means they're "ignorant".

Obviously these things happen but his demeanor was a major red flag.

I was given an offer but I passed on. The entire experience was awful. The other interviewers did not bother to turn their webcams on (nor did they even bother to give an excuse for not doing so). The whole thing felt like an interrogation.