The opposite requires that a larger than usual piece of your consciousness is missing even the most fundamental ability to understand an entity outside yourself.
In other words, to be the opposite of fair, you need to be exquisitely self-conscious. In order to be unfair therefore, you live in so much fear that being pathologically self conscious is an act of preservation.
Unfairness to you is a matter of survival. Should you even entertain the possibility of taking only what you need from a situation, to make a situation ‘equitable’ for all parties concerned, to you is akin to mutiny, suicide or, yes, even murder.
Fear in you is all powerful. It dictates the very narrow delineation of your miserable life.