Why do we even exist? Why should I not just kill myself

Why do we exist? What's the point? What is the meaning of life?

Life is just a endless cycle of jumping from one problem to another. First you're worried about grades, then about career, then about job, then about promotion, then about children, then about health, among the hundreds of other worries. Constant and continuous peace is impossible.

Is there a meaning in this suffering? No, one day everything will be gone.

Then why should I not end myself and cut short this majority of suffering and minority of happiness? In fact why should not most people do it? Other option is to learn to be happy in all situations, but that requires extreme amounts of self awareness. So why not end it all?

To note: This is not my personal state of mind, I am not at all suicidal. I was; I repeat, I was - not I am; I was extremely depressed and suicidal for a long time - but I'm far out of it now. I am very happy infact, life is not perfect, but I'm happy.