They still wipe their shit with their bare hand. I am ok calling any society primitive that can’t figure out how to use some form of water to wash their ass, or AT LEAST toilet paper.

And yet….

Doesn’t change the fact that the society has laws build on ancient superstition without reason.
A society build on primitives rules that follow such rules is primitive per definition.
Because the practice of such primitive laws guide all activity in a society.

What about death penalty to the victim is not primitive and barbaric?
How is a society that execute primitive barbaric laws not primitive?
Is it because they can make nice cookies?

How does this complexity you mention change that it is a primitive society?
Is it because it is not PC to call a culture primitive? Because then I’ve got news for you, some cultures are very obviously more primitive than others.