@Grimmycoffee He seems to have somewhat of a presence on the tournament level. Also I believe it was mentioned Osada could defeat Shougo when they used tournament style rules.
Shougo is getting out of hand. He had friends who valued him but because of his dumb complex he lost them. He has to grow up a bit. Though his development also makes the story more interesting so ig that is a plus.
So this is how you get so many chapters from that kind of premise. He can get into fights indefinitely... I wonder when his family will come out again, he's not going to be a teen forever.