For Any% loss category the rules just say to loss the games in the map you selected

I would consider a loss when you run out of food so your people are starving

So is a loss decided when you run out of food or is there some other requirement to consider it a loss, for example like you cant have any resources at all, and all buildings have to be destroyed

For it to be a loss, your people have to be hungry/unhappy for three days and then they will take over leading the world.

thanks I didn't know there was a actual popup like that