We're being very vague here. What is unfair? Unfairness smells of injustice, and injustice entails entitlement (i.e., something is unjust when I do not receive

We're being very vague here. What is unfair? Unfairness smells of injustice, and injustice entails entitlement (i.e., something is unjust when I do not receive something that is owed to me). But we haven't named the goods that we're supposedly entitled to. Where's the injustice? Or is it envy masquerading as righteous indignation?