You’re having trouble really fitting into your protagonist role. The world you’re in looks like it can’t be saved. Nobody’s declared you the Chosen One, and your attempts to self-declare seem a little off to the people around you, or even to yourself. Don’t worry, we’re here to help.
First of all, congratulations for experiencing a moment of self-doubt. The people who automatically see themselves as the one true centre of the universe, assign enemy/sidekick/lover/backstory/NPC roles to everyone else, and then set off to destroy something are usually the problem. If you’re not them, you’ve already made the world better.