Life is not fair

it's so damn unfair, A is nice, hardworking and eager to learn; B is messy, stubborn, takes MC like nobody's business, can't be bothered about the work done.. and yet A is the one who's asked to go..

I dun understand, I really dun.. at least A bothers about her work, B is not bothered at all.. life is so sososoososos unfair!