I feel like, if you strip away the outward trappings and dogma, this is what religion is good for. Not in a "believe in Jesus" or "trust in God" kind of way, but in a "how to orient your life" kind of way. Which is to say, the actually useful portion of religion generally teaches that your best life is probably not focused on you. It isn't about finding yourself, or being true to yourself, or really thinking about yourself at all. It's in being of benefit to the human beings around you. And in serving those around you, you become something that is worth being.
It doesn't matter who you are or where you live, there are poor people around you. There are parentless children, drug addicts, parks that need cleaning, animal shelters that need dog walkers. You can always do something meaningful with your life. Try that, and see what kind of relationships you make. Look at and actually see a homeless person. See how that makes you feel. See if your worrying about your own future maybe drops away, or gets morphed into something you can do something with. See what kinds of other people you run into that way. Focus on, if not bringing joy to other people, then at least making their lives better. See if that doesn't - as a pure byproduct - change your own self-worth. Or maybe just make you less focused on it.