Is someone failing to meet all of your expectations? If so, the problem could be with your expectations. This person does not understand the role they play in your life, so it is not totally fair to think that they do. You can choose to either readjust what you want from this person, or you can make it clear to them that they are not cutting the mustard. Your disapproval might just be the kick start they need to get their act together once and for all. You can motivate them.