The interview was only difficult because the recruiter was very rude and condescending. I asked about the team dynamic and how people succeed in the role and she dismissed it by saying "that's something to ask the team." I asked what kinds of questions I should expect if I move forward to the technical round and she just said "questions about your experience." I tried to follow up with "what kinds of questions about my experience, though, any specific technical questions you think they might ask?" And she said "you are legally not allowed to ask that," even though I've asked that in dozens of interviews to recruiters and they've all answered it thoroughly and/or politely. I had other questions for the recruiter, and it just sounded like she did not want to answer them and wanted to get the interciew over with. It was very unprofessional and unwelcoming.