Its somewhat an odd statement to say that someone “deserves happiness.” What does that mean? What do you do to deserve it? What do you do you to lose your entitlement to it? It seems to me that this statement should be more of a statistical conclusion – something along the lines of “because of historical data, I can conclude that I deserve happiness.” Its simply a measurement of how many things go right when they could have gone wrong – or perhaps a statistic about a streak of events someone deems to make them happy – and then we can conclude that whether or not that person was born with the entitlement to happiness.
So with that being said, I can say with 95% certainty that I do not deserve to be happy – and I have no clue why.