This is not an argument. Yes this is fiction so anything is possible. If Oda wants, Koby could surpass Goku, but that isn´t the way the story is going. Oda did not even want to make him beat Hancock after like, 2/3 years of buildup for that. There is no clash or anything, hes just completely irrelevant in his biggest mission for the marines of the entire timeskip. Oda clearly does not want this character to be stronger then Garp, who he´s pretty much wanking every arc. Wano, Egghead, Elbaf, all old gen wank, while the best and brighest of the new gen literally end up under the sea....
His preference is clear at this point, and saying otherwise is just coping. Again, if Koby is lucky he ends up above monsters like Doflamingo or Katakuri.

His preference is clear at this point, and saying otherwise is just coping. Again, if Koby is lucky he ends up above monsters like Doflamingo or Katakuri.
Kohy was in the contender spread and he's Garp's protégé. That alone is proof he'll surpass Prime Garp. Cry about it somewhere else.