[Arkshine]

You misunderstand the use of bind_pcvar_* natives.
They bind a cvar to a variable. Meaning that variable will contain the actual cvar's value in real time. This is NOT a cvar handle. You can't set a value from that.

To set a cvar with set_pcvar_num(), you still need to retrieve the handle from create_cvar() and using that value.
You can also use set_cvar_num(), it doesn't matter.