I do believe older people are happier than younger people in my opinion, they have less mobility and they don’t have the face or body that they used to own back when they had their time of youth; which slipped through their fingers and now they are just a shell of their former self immobile with disease sometimes so I would be unhappy as well, but maybe I am biased I love old people but they’re either miserable or reminisce on what they used to look like and how they were before. They regret the past and can’t seem to move on. Hope this helped, just my opinion on things!.