Carrot is far from weak especially since she can go Sulong whenever she wants from Chopper's drugs/snow fruit fake moon
She would've washed Perospero who negged other crewmembers without the cloud sabotage, keep in mind.
Not to mention if she does get that snow fruit I am very confident she would be able to go toe to toe with Kuzan.
This is a shonen after all, big power-ups are a thing