The Female Lead Just Wants to Survive

One moment I'm reading an apocalypse novel, the next I'm trapped inside it—as cannon fodder destined to die by the heroine's hand. My cheat system? Glitched at the worst possible time. My powerful backer? Just turned villain. All I want is to live through the end of the world in one piece, but fate seems determined to drag me into a revenge plot I want no part of. Can a background character rewrite her own death scene?