Screening interview: A concise interview to assess a candidate's suitability for a role. A follow-up meeting with the hiring manager, The last interview before the company decides to hire the candidate

First of all the the interviewer was 10 min late and did not turn on his camera for the remote interview. He proceeded to tell me how he was a sigma green belt and all his credentials and why he is so great for 5 minutes. He asked me general questions about the position, but his attitude was that he did not want to be there. At first I thought it was going well, but when he asked me why I wanted to leave my current company I explained that the company I work for has a small and new QA dept and that it's frustrating when you work on audits, but they do not take them seriously nor are there set standards. I explained that I wanted to work for a company with more experience so that I can learn. He immediately told me he didn't buy it and said that I would leave immediately if hired and that my reasoning was illegitimate. First of all I have already been with my current company for a year and 8 months, and 2nd my reasoning for leaving is none of his business im not going to go into detail and bad mouth a company in a interview that's not proffesional.