AMD Software Engineer I interview questions

I had reached out to the recruiter on LinkedIn. He passed my resume to another recruiter and he asked me for a phone interview in ATG group. The recruiter did not share Job Description(Since there is none apparently!). He asked me to schedule phone interview and talk to HM to know more details. I scheduled and on the phone interview, I find a group of managers on the other end of the call. Panel interview, Shocking! And they ask me questions one by one without disclosing job description! Then they invite me for onsite(though phone interview did not go that great) and schedule just 2 rounds. Ask about my experience in one and coding question in other. I felt onsite went great but received reject. Transparency missing in entire process