I'm going to say my little brother isn't good at basketball after the game.
Why would you say he isn't good at basketball?
Sometimes I get so angered that I have to wound somebody
You should criticize your brother after the game. Your brother is probably trying his best and criticizing him will just hurt his feelings.
I wanted to make him feel very bad.
It sounds like you want him to feel bad for petty reasons. Why not be uplifting towards him instead?