Only going off of the title of your thread I would say that yes absolutely everybody deserves to be happy as long as the means they are using are not harming anybody else. When I say harming I don't for instance mean the kind of psychological discomfort you make somebody else feel when you are in a relationship and for example break up in order to achieve being happy. When I say harming I mean serious methodical psychological and physical harm imparted to others in order to make you feel happy.