Well, the dude was either a very bad interviewer who was trying to play devil's advocate for some possibly positive reason (trying to answer someone else's argu

Well, the dude was either a very bad interviewer who was trying to play devil's advocate for some possibly positive reason (trying to answer someone else's arguments?), or (more likely) you were doomed from the start and dude just wanted a shot at making it known how much better the dude way is than your way. Either way, it sounds like putting the energy and effort into the interview wouldn't have yielded a positive outcome.