People rage in all competitive fighters. It's because we're competitors. We don't like to lose. We also have egos, and losing is a slap in the face of what we believe we're entitled to: winning, because lord knows I must be better than every opponent I face.
I'd say raging at a fighting game in and of itself is a good thing - I don't think channeling it in the form of actually lashing out at your opponent like some kind of manlet is good, but the passion that's there, is. Severe dissatisfaction with losses is what drives you to learn matchups and ensure that sh*t doesn't happen again. Anyone that plays a competitive game and doesn't get upset probably doesn't care enough to be good at it.