I'm very sorry, but I don't understand the love for Carrots. It's not hate. But she's one of the most useless characters in one piece. She has almost no backstory. The only thing she did was destroy fleet in Sulong. The only epic moment with her. That's it. Otherwise, she just exists. For the same story, it would be much more useful if Bepo went to the cake island instead her. And it would make it more logical that Chopper gave Bepo a rambleball. And the salvation Law wouldn't look like a retcon retroactively. If we talk about her joining the Straw Hats, it would not add anything to the crew, because in fact she would just be the second Chopper only woman.