Formlabs People Ops interview questions

I made it to the final round of interviews. The whole team was very lovely up until this point but about 10 minutes into the final interview she became very cold and dismissive. It was like she had made her decision against me during the interview and wanted to rush through to free up the rest of her day. I get that everyone has bad days but I expected a little more courtesy and consideration for a final round interview. I was rejected by email after 3 rounds of interviews and I never heard back when I reached out for feedback. I hope this hasn't been a reoccurring issue for other candidates.