That pretty much explains itself. Nobody likes to lose, especially in a test of "dominance" like sparring. Some people can't handle losing, they feel embarrassed or shamed, so they take it out on the winner. That can cause them to form a big head when they start winning consistently, to the point that they even rub their wins in the face of people who come close to beating them. I'm sure you see these types of people all the time. They're what make the community seem so "toxic", especially to newcomers. Anyways, I'm pretty sure 4-Lom didn't mean that negatively. A lot of people don't enjoy that kind of competitive activity.