So, Hero-san, your most useless team member, which was kicked out, win solo, against the black dragon your entire team couldn't even give a scratch.
Got anything to say? How about trying to humiliate him in public? Hmmm.... But if he comes back in the future with more achievement that you couldn't achieve, and solo too, what would that make of you? Something lower than trash? After all, you labeled him as trash, didn't you?
Hahahaha.... Did you like facts? Facts hurts, huh? Face it, pride is the downfall of mankind. To be successful, you have to stay humble all the time and not flaunt your achievements. Self praise is also kind of lame.