Sometimes being stubborn can be good, though when this happens, you would call it perseverance. There are other times, in most cases, where being stubborn can cause you further unnecessary harm. It’s kind of like digging a hole and continuing to dig yourself deeper into the hole.
Some individuals simply cannot accept defeat, and you may call these people sore losers. They are usually the ones with ridiculous egos and extreme competitiveness, mixed with stubbornness. There are times where you should just admit defeat and then withdraw to try it again in the future, after ironing out all the weaknesses.