Emma interview questions

Unprofessional and negative experience. First of all I did an assessment which is not easy, then some HR intern booked the interview with me for 1st round, 20 min, and was late. I waited for him for 15 min and I left, sent him an email, told him we were supposed to have interview 15 min ago, and asked him if ther's been some mistake. 6 min after the interview was supposed to end, he sent an email to me saying that they missed me, and asked me if I'm still interested in their company. While replying the email I sent, telling me "no worries", and asked me did the interview link not work? I immediately got pissed off by him secretely trying to put the blame on me. I directly said that the link was fine, it's just that you're late. He then said that there might've been a technical mistake. Not even an apology. Not even a simple sorry. I booked another call anyway, and another HR interviwed me. During the conversation, she was constantly looking away, lowering her head to take note or something, shaking her legs, and looking very distracted and bored. I answered all of her questions, calculated 4.75% * 440 fastly, she said she's impressed, and then 2 days later she told me they're not moving forward with me. (But to be fair, she did listen to me since she asked some questions from the stuff I said. It's just that her guesture and body language seemed like some high school teenager at a math class) Overall, a waste of my time.