I’m finding myself in general agreement with @Jak here. Though I wouldn’t go so far as to say that you “lack the capacity” to be happy – that’s a pretty bold assertion, based on very limited data – I would agree with her that you haven’t often demonstrated that in this forum.
Nearly everyone enjoys being entertained, but that’s hardly a route to happiness. “Contentment”, maybe – for a while, anyway.
What do you want to have in your life? What do you want to do or produce? What do you want to be? Moving positively to achieve some of those goals – once you have firmly established them and developed realistic plans and steps to achieve them – and accomplishing the steps along the way, that’s the way to find happiness. Ultimately, many people find that “accomplishing the goal” isn’t where happiness lies; it’s in achieving the many small steps along the way: learning, making mental connections, meeting new people and learning things you never expected to, and so on.
Obviously, if you want to be an oceanographer, Red Deer may not be the best place for that beyond basic education that can be achieved anywhere, just like the middle of the ocean wouldn’t be the best place for a devoted woodsman to pursue an avocation in the woods. But if you change goals like other people change their socks, then you probably won’t be happy anywhere, unless your goals are very modest indeed. And it’s true that for some people with limited capacity for achievement, but realization of the limitations and the ability to set realistic goals that they can achieve, happiness can be found nearly anywhere.
I know some grocery baggers at supermarkets in my area who have severe mental handicaps, but they do what they do, they do it well enough to maintain employment, and they always seem to be cheerful when I deal with them. On the other hand, some people I know who are true geniuses seem to always butt their heads against unyielding walls, and rail about things that are completely outside of their sphere of influence, “The company should do this or that or the other thing …” when it’s not their place to set or directly influence policy – and they’ll never find happiness that way.
Set a goal, make a plan, make a checklist of steps to back up the plan, and start taking those steps. That’s the only way to happiness that I have ever heard about. It starts with a goal.