As I’ve asked rhetorically in the past, when did Buddhism become the religion of happiness?
And now the grand irony: expecting that you ought to be happy is enough to make you depressed. See here.
As I recall the Dalai Lama having said somewhere, it is natural to want to be happy, and it is good to want others to be happy.
But when happiness becomes the norm, and not being happy is treated as a symptom of some problem that needs to be solved, then the ground is set for selling a lot of self-help books, and workshops, and so on. This is the logic of capitalism: create a felt need (whiter teeth, shinier hair, newer car, whatever), and then sell a product to fill that created need. Here the logic is: not happy? you should be, and we’ll make it yours!
Maybe I should close with :-), see I’m happy.