I want my brother to spend some of his first paycheck covering the dry cleaning expenses of a very expensive garment
Why should help with that expense?
I'm not going to help him out with his bills after he decided to quit college.
It is okay to be disappointed about him quitting college but you shouldn't expect him to use his paycheck to pay for your things. They are still your expenses and it will lead to a fight.
I really hate him and I'm going to make sure it's his entire fault.
It seems silly to hate him for quitting college. Paying for  your dry cleaning is not his responsibility and has nothing to do with your feelings about him.