Stay strong, Hero, everything will be alright.
No, I... ugh, I don't know what happened, but it's just that... happiness in its usual sense is so subjective that... what's the point of this "usual" understanding of it? I think there isn't any. What is a "bad life"? Who can honestly say that they are living worse than medieval kings? Sorry for the rude and silly remark, but they didn't even have toilet paper, ugh! )) And I'm not even talking about the constant intrigues, the fear for their own lives and the lives of their loved ones, and finally, the mistakes they made in governing their kingdoms: how would it feel to fall asleep with the thought that you killed thousands of people for some unclear reason and for some unclear purpose, and whether there will be more?
And if we are luckier than that elite class of the past, are we really that unhappy? Maybe it's just emotions that constantly manipulate us, making us feel down and sad...
If the situation cannot be fixed, what's the point of being sad? If it can be, then all the more so, what's the point? You need to fix it, not dwell on it. And no matter what your situation is, Hero, there is no point anyway. No, I understand perfectly well that reason is rarely able to cheer up feelings, but at least partially... Just let it go. Forget about the negative, but don't miss the positive. At least try. The human mind is a powerful tool, the result will not be zero.
Oh, by the way, have you read "The Brothers Karamazov"?