How about I yell at my barber for not cutting my hair how I want it cut?
Why do you want to yell at your barber?
Because he's cutting my hair like some butch.
It's understandable that that you are upset in this situation, but I suggest you try to find a calm way to express your displeasure with the haircut.
Yea, he's going to do what I pay for. He should listen.
You certainly don't have to yell at the barber, just let them know how you like your hair cut and they'll cut it that way from now on. Yelling might alienate yourself and they could refuse to see you next time.