It was never going to be fair for Supernovas, they were never meant to be serious rivals for the Straw Hats and it shows just how royal of a golden treatment Luffy and his crew have storywise.
The only reason they got this far in New World and Yonko sagas was because they got the Straw Hats' plot armor and accelarated power growth given to shonen protagonists, by virtue of being Luffy's cheerleaders this time.
Without Luffy Law would have died in Punk Hazard, Kid and Killer would still be in Udon mines, Bege and his crew would have eventually paid the price of their betrayal to Big Mom, and X-Drake would be still serving Kaido or dead.