Most people who are not happy are not happy precisely because they can't find a clear path to reach happiness. It's the realization you are stuck in a shitty spot that makes the true feeling of unhappiness. A lot of people are also restricted by their own body and mind through mental and physical illness which makes pursuing basic goals frustrating not rewarding. Also a lot of people get rejected when they chase girls and fail when they take IQ tests or pursue high paying work.... I guess your worldview makes sense for smart winners but how does it work for the other half of the world?