Wanted to talk about World Trigger but ...
Is pretty obvious Soma is focused on male character. While the female character is simply for "marketing". I mean you can see that most of female character is simply cannon fooder so that you can see their foodgasm reaction
While it is obvious the series tends to lean to one side getting more cheesecake shots than the other (about 65-to-35) I wouldn't go as far as saying that.
For example, the elimination of all female contestants at the quarter finals of the Classis was a disappointing turn of events(and the final shot with Soma not having a single female rival was confusing) especially after what Miyoko said regarding the status of top female chefs in the academy, but taken case-by-case, their losses served different purposes that eventually made them interesting. Alice was the tough opponent that Soma had to defeat to get the recognition that he needed (and starting the tournament with the strongest opponent did serve to hype it up) but eventually became more than just Erina's hot dainish cousin by learning more about her rivalry with both Erina and the friendship(?) she holds towards Kurokiba. Losing made her more human than Erina had been since the start.
Megumi's loss was a case of her story coming to the student body acknowledge that she simply wasn't a dunce who happened to luck into surviving every challenge thrown her way and that she was in fact on par with the top 8 students of her generation, but her timid nature gets in the way of her achieving what she should be capable of.
Hisako's own thematic arc required that she lose to Hayama in order for her to realise she could no longer simply aim to be no.2 in a hyper-competitive environment + not be so co-dependent on Erina and step out of the illusion of Erina being her "mistress" + finally reconcile with Soma and become closer to someone who isn't Erina (and provide a thread between the two that doesn't invo hostility from Erina or her).
Now, there are obvious areas where the female cast had been severely lacking (Erina) regulated to the cheerleading role (Nikumi) or had been misused in order to make a male character look better (Sonoka).
Food Wars is by no means a perfect story, and while those cases annoy me, I can also see cases which does show the authors do care about the female character development to not just be over glorified waifus (Megumi, Hisako, and to some extent Alice come to mind).
That said, I wouldn't call the majority of the female cast cannon fodder. If there was a single theme that
SnS is trying to get across is that so long you have the talent in this craft, losing once doesn't mean it's over for you. So even though some of them lost or haven't received as much focus as Soma does (and really, in this manga, no one does) I don't think they are simply marketing tools more so than the different assortment of marketing tools found in the male stereotypes in this cast.
Barely. I mean in term of story. She certainly better than most girl. but her story is simply "You are a normal girl. No matter how hard you try. You still cannot beat those who clearly superior to you"
I think you took the wrong message then from what Megumi's narrative arc was.
Megumi started out as being the bottom student who had barely got to graduate into high school after struggling through middle school, not due to a lack in ability, but due to shyness and timidness that caused her to lag behined her peers who were more forward and egoistic than her. Since meeting Soma, he had managed to help her break out of her shell and got her to be more ongoing and welling to stand up to what she thinks, even if she ends up worrying and being afraid.
Megumi took everything she learnt from Soma on being to confront whatever challenges come her way head on and not allowing her worries to get the better of her, and trust in both her skill and herself more. She understood that there was something she could offer as well in this hellish school. That's what lead to her dish being acknowledged by Gin and Shinomiya, what lead to her winning out in the preliminaries and the students to clap for her when they hadn't done so for any of the other contestants, out of respect for her standing up to Kurokiba even if she lost in the end.
Megumi's evolution, to me at least, is one of those stories that while it is cliché (like a lot in
SnS) it is so well done and continues to best great to watch unfold because the authors understand what makes characters like her click with the readers. She covers and aspect which Soma's character is meant to cover but isn't able to do fully because his personality negates the underdog factor that makes the reader want to see him beat the odds and take the top.