Alexander the Great “won”, sort of. He defeated their armies, then exterminated every village that supported the fighters. After five years or so Oxyartes, the main “king” opposing him agreed to swear allegience in exchange for continued rule, and Alexander married his daughter Roxana to seal the deal.
They also broke his leg in a skirmish. Alexander did suppress them for a time. Genghis did better.
To fix the place would take nothing less than full genocide, which Genghis attempted, but lacked the means to complete.
It could be done, but why? It has rocks, goat turds, goat pokers and poppies. That’s about the inventory.