Shopify Designer interview questions

I went through three rounds of interviews here. I was told I'd be called in to meet the hiring manager as the final stage off the process, but then they told me that there was a change of plans and that instead they'd like me to meet a senior technical recruiter for a "life story" interview. This felt weird as I did not understand why they changed the scheduled plan. This interviewer was not very professional. Stopping to chat with the office manager for some time instead of greeting me in the waiting room in front of me, and then in the interview never bothered to dig deep enough to get to know me as a person. It seemed like it was very surface level and generic. I wasn't aske any questions about what impact I've actually made in my previous jobs. I'm not sure the interviewer really knows how to read people because the opinions were absolutely biased. Later the interviewers said I'd get a follow up before the end of the week, which never happened. I then requested feedback but no one got back to me still. Another week went by and finally the interviewer sent me a rejection email without any explanation of why I was not selected for the job. For busy professionals who take time out of their day to interview at the "supposed" company who's core value in being genuine you'd think they would care enough to at least provide genuine feedback to candidates would you? I still have no idea why they didn't choose me. I feel like Shopify was the least professional company I ever interviewed at and I would never want to work there if this is an example of how they treat people.