It isn't rude? How not? I guess we're having a cultural clash here, otherwise I don't understand. When I'm frustrated I try to collect myself and be mannered.

It isn't rude? How not? I guess we're having a cultural clash here, otherwise I don't understand. When I'm frustrated I try to collect myself and be mannered. It's not an excuse. Communicating properly not only makes everyone lives better but also allows better understanding. It's more efficient.