Why should exist?

This is a question that a lot of people should ask

why should we exist ?
why shouldn't we all die ?
end everything
be it happiness sadness joy suffering whatever...

Then there will be only nothingness and emptiness but it will be worth it

it's always been fed into our brain that we should be kind behave nicely and strive towards betterment and perfection
these are all the good things and teachings to make the world a better place and the world should be a better place than it is now

but why should we make it better instead just end it and with it everything

I just don't see any meaning in the existence of humanity

I am not trying to act smart or intelligent it's just that I have been thinking a lot

just the main question is

"Why should we exist and why shouldn't all life extinct and end everything whether it be a good thing or a bad thing"

please put your arguments based on various religious philosophical spiritual personal or any other kind of belief , I want to be humbled and really want to know the answer to the question.