> in science studies that money absolutely makes you happy up to a certain point
Perceived happines. It's hard to talk about happines with a person with an empty stomach. But I was much more happy when I was young and poor than I became a not poor but no longer a young one.
> Perceived hapiness
Is there any other kind?
That's not because you were poor then and not now but because you had few responsibilities then and many now. When you were young your needs were small and solely affected you, now your needs encompass those of family (I'm guessing that you have children). Even without family you have responsibilities to society and employer that you either did not have when young or that were simply less urgent.