My brother corrected my kid and now I want to tell him to fuck off.
Why would you be so mad over that?
I don't know but I don't want my kid corrected.
It can be hard to think your child is not perfect but you shouldn't stop trying to make them better people. If they are doing something wrong it is good to correct them.
Teach your own kids. Don't bother my kid. You don't know how I raised him.
You're right that your brother shouldn't correct your kid, but you should correct your kid yourself. While I have no say in how you raise him if people continue to correct your kid then maybe it is his fault?