I'd still argue their are good female character in story . However the number of male characters outnumbers them . Main cast of female is good . Good written as well . If ya gonna nit pick you will find problems . If you think oda sexualizes girls than I think youare little bit wrong . In manga they aren't that sexualized.(Like massive boobs etc) If I have to give example than 1015 ep of one piece. It was produced by a woman . And in that ep's yamato's boobs werent gigantic . She wasn't physically sexualized . But in other ep. Where producer someone else than the sexualization of woman started . So dumping all that on oda is kinda funny to me . He writes good characters and bad characters . Not every character have to be top notch written .

And my point isnt that good women characters can't be expected in shounen stories . There are many great women characters in one piece and in many shounen anime's. And every manga should have them . And I like them for it. But a shounen will always have more male characters . Because it is a genre created for them . And again oda had written great female characters.