All that said, yup, this existence often seems pointless. I've read enough Existentialism to drive that point home. We do often feel trapped without purpose. We struggle to dignify our jobs, our relationships, ourselves, and our future. Really, this is it? Really?
Then you fall in love. Or experience a sunset on the open ocean. Or see the Milky Way from the middle of the dessert. Or skydive from 10,000 feet. If your life feels mundane, then make new choices. If you're willing to kill yourself, kill who you are and who you've been. If you have nothing to lose by ending it all, why not start over in a new country or a new profession? Find hobbies that require taking chances?
Meaning is what you make. If you are convinced there is none, then the hardest look is the one inward to find another identity. Who said you have to be you, the same you, each and every day? Kill yourself but don't end your life. End the choice of who you are and find another, more fulfilling version. What do you have to lose?