In the anime " One Punch Superman ", why was the monster's explosion of the mountain called the shame of the dragon level?

In the anime " One Punch Superman ", the monster's explosion was called the shame of the dragon class because his strength far exceeded that of ordinary dragon class masters and could even be directly comparable to Saitama-sensei. In the anime, Saitama-sensei was the creator of One Punch Superman and also the strongest existence. His strength was divided into two levels: "the strongest in the human world" and "the strongest in the universe". Baoshan's strength had also reached the strongest category in the universe. Although Baoshan was very powerful, his performance was often unsatisfactory. He had been defeated many times by Saitama-sensei and often lost to other dragon-class masters. Therefore, he was called the disgrace of the dragon class because his strength and behavior did not meet the standards of a dragon class powerhouse.