It's probably somewhere in the middle.
Every life has disappointments, heartache, misery, up times, down times and fun times. We have to ride the waves!
The challenge for a lot of people is viewing it as fleeting moments. Everything is temporary both good and bad.
So many people easily feel "overwhelmed" when things are not going their way.
Instead of saying: "This too shall pass." They'll relive every slight or pain and selectively forget any "good times" they ever had!
They scream "Life is not fair!" and then curl up in a corner cynically looking out at the world and other people.
"They're happy because they're too ignorant or stupid to realize how bad things are!"
In other instances you have people worried (today) about things that may or may not happen tomorrow or in the future. They simply cannot enjoy or live "in the moment".
Probably the worst feeling in the world is to believe tomorrow, next week, next month, or next year won't be any better than today. That has to kill one's spirit.
What's the point of going on if there's really nothing to "look forward to"?
I imagine that's the tipping point for many people who commit suicide.
Many people wait until they're almost out of time to pursue their "bucket list".
We spent most of our lives "playing it safe" and rationally avoiding pursuing our dreams for fear of failure.
It finally dawns on us that no matter what we do we're going to die in the end.
You might as well swing for the fences while you're here!
Most people don't ask enough out of life. Whenever you ask for only one thing and you don't get it that's devastating! However if you asked for a 1000 things and got 400 of them you can put life in a better perspective.