I still think you are suffering from something that medical professional could help with, so far everything you describe at the very least are symptoms of depression.

In the long run it doesn’t matter what’s definition of boredom and how it’s differing from loneliness. What matters is that you are unhappy and are suffering. You are trying to justify your pain by claiming that everyone else is also bored lonely unsatisfied unfulfilled and hate their bodies. It’s not the case. But even if it was, what does it matter?

You don’t want to seek help but want anonymous strangers on the Internet define things for you. How does it help? How could our definitions help you to feel better? Is it just venting or you want help? I am not sure how many more definitions could we provide?

Living in the rural area and working a lot or not being a billionaire in no way explains your suffering.