As tragic as life is, you don't make it much better by wallowing in sadness.. of course this is valid, but if it did you any good thinking this way then you wouldn't complain. You'd be content in it, you wouldn't notice because it would count as mundane and normal. But you seek more, and you can do more, even in the position you may be in… I admit I cant know though, I can only speak from my personal experience. I might be wrong. In that case, I'm sorry for mischaracterizing your problems. But if I'm not wrong, please at the very least consider that things could be even just a little different.
Besides that, I would like to say.. death isn't always tragic. Our lives may all just have been lives, but it's the experience in them that makes it worthwhile and the changes that happen and the experience that make it what it is. Death isnt always tragic end to it, but resolution to every bad thing that happens in those lives. You seem to view it as though life can only be pleasant if certain ideals are met, I agree, but it can also be pleasant through small things, appreciation, beauty, and the acceptance of whatever suffering comes with it because that's just the experience of being human, bitterness won't change the experience of life to a positive, appreciation can.