I agree, it was terrible. As I understand it Musk offered the interview unexpectedly and at the last minute, sort of now or never job. The lad who did it might not have been BBC's preferred choice and he may have had little time to prepare. If this is the case it's tough to criticise him too much, but I'd criticise BBC for allowing themselves to be steamrollered into it. Musk's a canny operator, he'd see off many a seasoned interviewer.
In fact it was the opposite, the BBC just turned up at his offices and asked for an interview, musk said yes and gave the interview. The guy from the BBC was just terrible