With the Ginyus trapped in Hell, they're unable to continue to grow stronger and, in the anime, they're surpassed by Tien Shinhan, Yamcha, and Chiaotzu before the Frieza Saga is even over.

Frieza has something that other Dragon Ball villains don't, and that explains why he gets to keep coming back while others ...

Dragon Ball Super Chapter 101 sees Goku addressing Black Frieza’s new level of power, and Beerus reveals that he’d nominate Goku as the new God of Destruction once Goku is stronger than Beerus ...