Survival on a Desert Island, but I Clicked on the Full Level Survival Talent

The protagonist Lu Li wears a T-shirt with the words "I am Waste" printed on it and lives on a desert island, bound to the "Wild Life System". The system deprived him of food and water, and only assigned him various shameful and outrageous tasks (such as square dancing on the beach, using coconuts to wash the stomachs of sharks), but the rewards were "negative gains" that took effect in the opposite direction, forcing him to experiment crazily on the verge of death.