ProSapient Research Associate interview questions

The application was straightforward. Made it to the first interview with HR and had a terrible experience. The recruiter was not listening and was scrolling through different apps on their desktop, which was evident in reflections. Despite using the STAR method to respond to questions, I would be asked to elaborate 2-3 times for the same question. At one point, I asked a question towards the end of my response and was responded with 'can you please elaborate'. At this point, it was quite clear the interviewer was not listening. Following the conclusion of the interview, I was not given a chance to ask questions and when I emailed the questions, I was ignored and straight up rejected. Not sure why they wasted both our time when the recruiter was already set on not hiring me?