@liquidsword I mean, he really is arrogant in this certain chapter for looking down on Onee-san's lifestyle, telling her she doesn't understand how life should be lived. Being a middle school student doesn't mean that he's exempted from such criticism. Besides, I can't empathize to someone whose story I don't know, so I just stated my observation. And even if he has some tragic backstory that caused him to be like that, it doesn't change the fact that he was arrogant. Well, at least he realized it soon though.
And I fail to understand how I am being dramatic. I just expressed my dissatisfaction over his actions. Also I'm not specifically annoyed by Shounen himself, I'm annoyed by him acting as a know it all despite being a kid. That's why I specified it in my first comment.