Life is meaningless and humanity exists because of a massive fluke. At some point in the passage of time, life was going to occur somewhere in the universe, and it just happened to occur here, on a Goldilocks planet. Because the chances of that happening were slim to none, we're likely the only intelligent life for light years in any direction. We are purposeless in our existence (there is no such thing as "intelligent design"), but evolution has given us a desire to be entertained in addition to survival. Humanity no longer exists just to live as our predecessors did, but that doesn't mean there's value in our continued being. We make that purpose on this small, insignificant rock we call a home.
There's nothing wrong with any of that, so try to make the best of the hand you've been dealt, OP.