Deutsche Bank interview questions

They take interview through a portal. Interviewer was totally unprofessional. They didn't respond or follow up on any of my answers whether it was right or wrong. At times they would ask a question and would go away to do their own work and i would keep asking "are you there?" then they would come back and ask me to explain the answer again. They kept asking me if I had experience in different tech stacks(front-end, dev-ops) which I never mentioned on my CV. I am pretty sure they didn't bother to go through my cv. This was the first round and i didnt hear from them again. Deutsche Bank, if you are reading this please make sure that interviewers aren't busy doing their own work while candidates put in so much effort and time for the interview. I have given interview for the company 2 different times and i faced the same issue both the times.