A state in which an individual feels that s / he has lost something valuable, and is not getting something what s/ he deserves is called:

Deprivation

Deprivation refers to the state in which a person feels that s/he has lost something valuable, and is not getting something what s/he deserves. In deprivation, it is more a question of perceiving or thinking that one has got less than what one should have got. Thus, a poor person may experience deprivation, but poverty is not a necessary condition for experiencing deprivation. The situation of the poor is worsened if they also experience deprivation. In reality, usually the poor also feel deprived.