For sure. The last thing I’d do is a shitty appeal to popularity lol.
But moving on, how exactly are you measuring story quality? To me the closest measure would be level of enjoyment, which is purely subjective and where I derive my “story quality is subjective“ belief.
Now you may present some criteria about how quality stories shouldn’t do X or Y, but why? Is there an objective basis for that or is it just subjective beliefs being presented as objective?
I think the issue isn't in itself how you measure quality, but that a lot of people simply judge it as enjoyed = good, which isn't necessarily true, some people can't accept that what they like might be trash, many times you can tell right away that the work is bad, be it story, characters or whatever, but you can still enjoy it, some works are bad, some are so bad it's good, and some are so bad it's horrible.
Example of what I mean,
The Beast Tamer Was Fired From His Childhood Friends' S-Rank Party, typical kicked from party story, Mc is typical generic wimp beta nice japanese protagonist with barely any personality, who forgives his ex team even though they treated him like trash and literally tried to murder him, the story and mc as a whole are objectively pretty bad, his tammed monsters literally carry the story, if not for them it arguably has no redeeming quality at all.
Not kidding, the fenrir and the ant children are literally the best thing on it.
After having read dozens of stories with bisexuals, I‘ll stick to my beliefs that stories with lesbians are better and stick this to the bottom of my PtR list, along with other similar stories. Maybe I’ll reach it on my PtR list one day, maybe I won’t, and if it‘s the latter it’s simply because I have better (aka lesbian) stories to read.
Issue is that you're doing misplaced retribution, the character being bisexual has nothing to do with the story being good or bad, it's entirely because the writer sucks at using the character, they can't write better drama, so they use bisexual character for easy cheap drama.
Example of what I mean, Kodama Naoko, some of her works have bisexuals but that has nothing to do with the quality of the story, because effectively all of her works are extremely melodramatic.
Days of Love at Seagull Villa is good example of what I mean, Mc is bisexual but her romance with the other girl has literally nothing to do with it, no drama at all between them because of that.