Actually, I don't hate any Mario characters despite the things I've said about some of them (Birdo, Roy, Waluigi, Fawful), I only dislike them, Bow just happens to be one of those characters. I'll admit she's useful, but that's only if your enemy has 0 defense (try fighting the second Bowser battle with Bow as your partner) and I'd say after fighting Monstar, her usefulness in battle is gone, unless you need to use Outta Sight.
tldr: I just think she's overrated, that's all.
Goombario: 32
Kooper: 31
Bombette: 32
Lady Bow: 22
Watt: 41
Dead as a Doornail:
Lakilester
Parakarry
Sushie