You can tell a lot about something when you know what it was made for. I’ve tried to use a lot of different things to put a nail in a wall: a rock, a shoe, the back of a screwdriver. But there’s nothing like a hammer for driving in a nail. What something is made for gives it function, meaning—purpose. And purpose is a good thing.
The purpose for which God made man will probably always remain a bit of a mystery. But things get created either to fulfill a desire or to fix a problem. I believe God created us for both. For the triune God, desire was expressed in the question “Whom can we love?” And the problem (if God can have a problem) was “With whom can we share, entrust, the running of creation?” To both of those questions, we were created to be the answer.
And therein lies your purpose and your worth.