TikTok Backend Engineer interview questions

HR round was good, but the next round with a backend engineer guy is really terrible. He's not even introducing himself to me at the start, he asked a few questions about my past exp, followed by a simple system design case, then a leetcode kind of question which I managed to finish with a working solution in time. He didn't communicate at all, barely speak while I was explaining my thought process. He didn't leave much time for me to ask questions, I only ask 2 qns and then he immediately says "if no more questions, i'll hang up the call" and immediately end the meeting. So rude. I didn't even know his name. I ask HR and got the rejection the next day. So bad I think I did well.