What's the Use of Being Reborn in the Doomsday?

When you wake up, the world has ushered in the end of the world. Yes, a clichéd doomsday setting, of course, also requires superpowers. Unfortunately, what the protagonist gets is not a cool ability. The rebirth system can go back to the day before death. It seems unsolvable, but for an ordinary person, what can be changed? It is just despair all over again. This is a never-ending doomsday life. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.