Dear
OP,
It sounds tough feeling annoyed by this. I am wondering what you are hoping to gain out of posting this? No one here is going to agree that some people are not built to live unless they are suicidal about themselves and feel the need to justify wanting to take their life.
I will tell you that I have had suicidal ideation for years and in my worst moments I will feel that life wasn't meant for me or that I wasn't built for to live and those are thoughts and feelings that are not grounded in true facts. It just isn't. And I know it isn't because I won't feel that way except about myself. I'd never go around telling people who is made or not made for this world but then I would do that to myself. And the kindest people will treat themselves as the exception. Depression is like being under a spell that your reality is different. It isn't inherently bad but it is different. And chances are you will not feel this way if you are not depressed. If you feel some people are just not made to live as a general statement about the human race, that is something to explore about why you feel entitled to judge others in such a harsh way.
Suicidality is a response to distress, by definition. It is a desire for the body to die in order to no longer suffer. It is when playing dead isn't a strong enough strategy that a person wants to actually die. There is shame involved. A person feels too horrible to take up space and exist. There isva lot to say but chances are this post is ironically a plea for help. That is how I read it and what I am interpreting this post to be. That you know full well suicidal folks are depressed or are in another mental health crisis.
Having said that, you are always welcome to give more information about what you are going through.