I'm going to talk over my friend
Why do you want to talk over your friend?
I have a problem with his attitude and I want to criticize him
Talking over your friend will make him have a bigger attitude. No one likes to be talked over.
It is all good. I am going to try and change his attitude.
Well hopefully you try in a more respectful manner. Talking louder than he is is simply going to make him raise his voice even more.