Slack Program Manager, Mobile interview questions

I applied online and was introduced to the hiring manager via email by another employee. The hiring manager didn't respond for a couple weeks and said she "doesn't check her email". During the call I could tell she hadn't reviewed my resume and wasn't interested in hiring me. She also said she had never used Twitter (my previous employer) and didn't know what it was. After the interview she emailed and said she was looking for someone with "some mobile experience" lol