Two rounds of technical interviews. Very algorithm and performance heavy. Leetcode example style questions. Some behavioural questions around CV walkthrough. Make code compile and fix errors. How do you think your experience applies to this role or this sector

I was invited to a first-stage interview where I was asked about my experience and some basic behavioral questions. I thought the interview was going well, but at the end, I found out that the interviewer was actually an Application Developer who had only been with the company for seven months. It felt odd to have a junior-level employee conducting an interview for a junior-level role. The interview lasted only 20 minutes, and while the questions were quite basic, I was later told that I didn’t provide enough 'technical detail.' Given the short timeframe and the nature of the questions, this feedback felt unclear and somewhat unfair. Overall, it was a disappointing experience given this firm is rated so highly.