Destabilizing her chakra made her into a monster that Naruto himself was defenseless against :bdpf:He destabilize her chakra making it unstable ya he did get help from others . But Naruto was the winner in Kaguya arc he played the major role in defeating her.
Ur claim was that Naruto fought Kaguya almost single handedly, i simply wanted to show u exactly how much help he got.