Street Solutions interview questions

My resume is submitted by my employer and I received a call to take F2F interview. On the day, I reached their office and when I reported the person of contact. They do not have much idea who is going to take the interview. Once they had their person, the process began. He started asking me about my present project. I explained him, then he asked a few questions which he could not frame well. I understood his questions with great efforts and sometimes when I ask to repeat his question, he felt offended. I tried to make sure that we both are on the same page after his questions, so I just made sure asking him few cross questions with his. He was like "do not make the question complicated". I felt that it was pretty rude. Anyways, I received an offer. But, I felt the environment and the right attitude was missing which I did not find to be professional. I declined the offer.