People tend to overrate happiness. It's a good goal to strive for, but you cannot be happy all of the time. It's physically impossible, if you experience a happy sensation for too long your mind resets the baseline.

There's pretty good evidence to suggest that billionaires for example are not demonstrably happier than someone who is simply well off. If you have enough money that you can live comfortably and you're sick, that's basically your lot. It doesn't get better than that from a happiness point of view, can have nicer stuff but it won't make you happier.