Gorilla Logic Back-End Senior Engineer (Python) interview questions

First interview was really enjoyable, it was like a conversation about why you want to work there and what you know about Gorilla Logic, mostly typical for HR interview but more like a conversation. Second, they send you the benefits of working for Gorilla and the link for the test. Third was a technical interview, but I don't get to the part of the questions, the interviewer in this stage was a really informal an he don't even review my CV or anything before the interview, just start reading all on the fly, he told me that I had great score on the test, so I get excited, but then he ask me if in my previous work I had US clients, and because I said "no", he told me that because of that and my English that the US clients doesn't going to like me, he don't even hear me speaking he only ask me one question, in less than 5 min he just discard me without even an opportunity to speak English or to prove my skills. If my English was so bad, then why they let me continue after the first interview, just to reach the last interview and reject me without talking, they just demotivated me and know I feel more insecure about my English, that by the way, in other US companies think I speak really good.