Shopify Software Engineer interview questions

This was the typical Shopify interview. Starts with a short screen with a recruiter, followed by a 1 hour coding test, another hour "life story" talk with a recruiter, then a 4 hour interview process on site, consisting of 2 peer programming sessions, 1 lunch and 1 "technical deep dive" talk - all of these are posted and described quite accurately on their website. One thing, the technical deep dive went a lot less deep than I thought. I was applying for an Android position, and described an Android project I'd worked on, but the interviewer had no Android experience and so wasn't able to actually ask any questions to test my knowledge... Feedback was pretty quick after the interview - I was given a phone call to indicate being rejected within 3 days of the interview. All of that was fine, even though the interview process is very time consuming - pretty close to a full work day. I knew lots of people applied, and they likely had a lot of qualified applicants. But the feedback I was given was very disappointed and left a very sour taste. I don't expect companies to give feedback as to why a candidate is rejected. But they offer feedback, which means it should be fair. The feedback I was given was that I didn't seem to be familiar with Android specific development. I was quite shocked at that, seeing as I've spent over 5 years delivering professional Android application, so I asked for specifics - the recruiter basically ended the conversation then and asked me to follow through by email, which I did. I felt like I was judged more on the nervousness of being interviewed than my actual skills as a developer. The recruiter actually answered my email a week later and asked me to connect on the phone - I replied that if it was for additional feedback I'd be quite happy to just get it summarized by email. By then I was quite done with wasting any more time on the "process". She insisted on a phone conversation - in which she just repeated the exact same feedback, saying they believe in the process and their interviewer gets lots of training so it must be fair. When I asked if the other 3 interviewers had felt the same way - I was basically trying to figure out if I'd totally blown all the interviews, or if it was just the Android-specific one that didn't go well - she said that I had made her very uncomfortable in the previous call where I asked for clarification, that she didn't want to provide me any more feedback, and then hung up on me. I've never been treating so unprofessionally from a recruiter before. If you're going to give candidates feedback on why they were rejected, and the feedback is complete opposite of their actual experiences and skills, you should be able to back it up, and not feel "uncomfortable" by a candidate asking for clarification.