Itergy interview questions

I only had one interview in this company, but I must say that the way of interviewing is not adequate, the interviewer made me feel uncomfortable when he saw that English is not my native language, and when he asked me in what level I classified my English profiency, when I gave the answer he made a bad face and said I don't believe you making me feel uncomfortable and bad for my answer. It seems unprofessional to me to have that kind of acts knowing that in an interview the person can be nervous and it is disrespectful to give a bad opinion and with bad gestures the answer of the person, if they are like that in the interview I definitely thank not to have started working in that company.