Breath of the Wild would you view the Calamity as this?

[Goldenrod123]

The point in time where Demise almost won his side of the curse. In his/ganon's mind, believing he had killed the Royal Family and ended the divine lineage, killed hero and any hope of salvation left and nearly succeed completely destroying hyrule and rendering it an uninhabitable wasteland.

The Hero and the Goddess really did slipped and lost their footing on their side of Demise's curse and Demise's incarnation almost won.