The reason why the Primordial Nine Races were called the Primordial Nine Races and ruled over the world was because every single one of them possessed extremely powerful inheritances and capabilities!
Humans were innately weak. Even in their prime, they might not be able to kill ferocious beasts.
However, it was different for the Primordial Nine Races.
When these races were born, they possessed innately powerful abilities!
For example, the Golden Crow race was born with three legs and could spread their wings and fly, wielding the Sun God Fire!
The Golden Crow race could even kill spirit beasts and demons with ease, let alone ferocious beasts!
The Dragon race was born with sharp fangs and claws and controlled the five elements.
Every race specialized in different abilities.