Having powers won't make anyone like coby.
People dislike him for his character portrayal and oda giving him attack like Garp (let's hope it's not ADCoC) then it will make people shit on Coby more
Yeah my issue with Coby has always been his character no matter how strong he gets I'll always slander him for the plot convenience character Oda has written him to be. Coby at this point doesn't even feel like a real character.
It's why no one cares about his relationship with Garp, or Luffy or anyone else he's the offscreen character Oda dropped the ball not having him in the series more often to develop his character.