What do you think about me wanting my ex to be hurt the way that he hurt me?
Why would you want that? How did he hurt you?
He cheated on me and made a fool out of me
I can understand why you would feel hurt, but wishing pain on your ex won't help the situation. You can still be angry and upset with him for cheating on you, but also think of reasons you are grateful to not be in a relationship with a cheater now.
He is trash and karma will hit him hard.
You may still think that you want this, but you using up so much effort on hating him. Why not try finding someone else instead of hoping so badly for someone you used to care for to be hurt?