EPAM Systems interview questions

I received a call from a recruiter and had an interview scheduled with the lead. However, I'm not sure if they are actually hiring. The interview lasted 1.5 hours, and in the end, he said my approach was unsuitable for their requirements. He asked basic theoretical questions, like "operator overloading" and constructors in Python, along with a request to write a design pattern, which I did. He also asked me to solve a few Python coding problems. I provided solutions covering all edge cases with O(n) complexity, but instead of appreciating it, he seemed insecure about how I was able to solve them. Despite answering all his questions and solving the problems correctly, he was not happy. It felt like he was unwilling to accept my approach just because it exceeded his expectations. If I wasn’t suitable for the role, why conduct a 1.5-hour interview in the first place? Interviewers should encourage strong solutions rather than dismissing them.