I agree that man made rules should be fair to all of us. It's not good to treat people differently based on skin color, gender, age, or anything.
However, things can happen to us unfairly sometimes and they are not avoidable. The question is how we respond to them.
The most popular response is complaining and blaming someone else. The problem here is that it cannot be the solution most of the time. We need to figure out the real solution.
Bill Gates said, "Life is not fair; get used to it!".
Complaining, whining, crying and so on don't really help. Face the fact and respond accordingly. It is easier said than done though. I know. Sometimes it is very hard not to complain someone or something. It takes training through real experiences.