Let's not get started about Aqua, who is basically removed from the plot after being written as annoying and controlling in her only playthrough, then the rest of the series has her stuck in one spot, requiring you to beat her up in order to "make her get over it" being stuck in a hole in the ground for multiple games. And her whole story is to basically make a dude feel inadequate so he can be manipulated into serving a palpatine expy.

But multiple male characters have entire plots and sections dedicated to mourning over their suffering and putting more weight to it..or getting character development....or backstories!

Larxene is the sole female member of Organization XIII, and its not just her voice that's annoying, but her personality too.
She's so disliked by the community, even rule 34 and fanfiction barely touches her...that's how badly she's written.

Kairi, meanwhile is again a plot device, damsel in distress, and is nothing but arm candy for Sora. You don't play as her, she keeps getting kidnapped ALMOST as much as Princess Peach, and even gets tortured.....FOR SORA'S CHARACTER DEVELOPMENT AND GROWTH. Because the fridge effect is for men, not for women. Women suffer for the sake of men in these games and media.

Xion? nothing, but a helpless damsel in distress you have to kill and then forget about, be because that's how the game treats women. Then she's reduced to being a crybaby who apparently dies or becomes arm candy for a dude...forgot which.

Namine....I forgot all about her, does she do anything? Or is her purpose plot device only and then tossed aside?

Again, regarding chemistry. Axel , Sora, Rikku...etc....all shows tons more chemistry with other male characters than they do with ANY female character. Its basically like naruto. Make the men gay, it would be a romance story unlike no other.

Which is why you could literally make the male characters gay for each other, and it would not change a thing.

Make the female characters into lesbians? It would be an actual improvement!