System design stage of the interview was a total failure. The ask was to build a small part of Let's Do This' system up from scratch in about 45 mins. There were zero interaction during the presentation. They just stayed silent with blank faces. Nothing to reflect whether you're talking about things they are looking for. I had to explicitly ask whether am I touching the right points or not. They kept saying yes. And then at the end of the session they send an uncalled for feedback which I thought was patronising and presumptuous. It contained remarks such as "Too much talk very little action", "He was filling the time". Probably one of the most disrespectful interviewers I ever seen.