Robert Half Senior Software Developer interview questions

I got a cold call from one of their recruiters for a job with a raiting company(stocks). They had recently placed a person there who already got let go. I was told the interview would be a one 30 minute interview with the CTO. I was told they needed someone who was full stack but really it was for someone working on ETL database stuff. The interview was odd, i got asked one coding question and the rest of the time I felt like I was talked down to because I came from the banking industry. I was a little insulted as I have been in the IT industry for over 16 years. Then of course I can't get any response from the recruiter at Robert half. This is just another staffing agency who talks like they are your best friend and then ghost you.