
his go to excuse is "i am so conflicted :'( boo hoo poor me, i need to protect aria but i just can't do anything rn except this :'( i am such a tortured martyr bc i owe something to my sister (&ofc I don't wanna be poor) so i can't hook up w/who i REALLY want </3 i'm doing the Right thing but my heart <3 tells me otherwise"
like bro aria and other characters have less power/influence/resources than you and they account for more plot progression than someone who's supposedly the 2nd ML gtf outta here with your whining
also, i love the mom
that's right, drop the count like used laundry it's what he deserves
and aria's immediate, "aight momma let's bounce, let's get tf outta here" bc she knows she's already loaded af on her own + with the backing of the crown prince and elite merchants in the country ayeee

they're not mad at actual human girls
most people are mad at shonen writers/mangaka who build up a good plot with a male MC but prove they know jackshite about creating female characters which says a lot about their sense of empathy. they only know how to frame them sexually, not as an actual human being w/c ruins story immersion.
don't reverse the narrative here.
of course there are incels who literally can't tell reality and fiction apart and project their anger from a harem character (who is often a badly written pixie dream girl) to actual girls and women. imo they need to be segregated from society
but majority of people who react badly to girl side characters being introduced are those that have experienced the jarring disappointment of a story they like being marred by tired, gross, sexist stereotypes that add nothing to plot progression. for girls who love shonen i'm guessing it's even harder.
welp, with all that said
i think it all boils down to how much you trust the author to handle character development.

I can relate to it. I'm so exposed to harem in shounen mangas that sometimes, if a girl is introduced in a certain way, I can sense that there will be harem or she will have a hots for him. It's uncomfortable because you'll think in the back of your mind if this is how the author or the target audience views girls in real life, but also, there is this feeling that a certain female character might ruin the story for you. I can only think of few female characters that are treated as characters and not as a plot device, a love interest, or a fan service. So, while it can be annoying to read comments about wanting to not have romance in a shounen manga, I can understand the sentiment.

relationships probably don't look that practical let alone appealing to her
eg. how his father neglected her & went a bit cray after her mother died. & the treachery & instability in the royal family alone can disillusion anyone from romantic love.
since MC knows ML is initiating physical contact, she took that as him maturing into a man ready for marriage. and his affection can even be taken as unhealthy dependency. the ML probably even has this image of her on a pedestal (thanks to her calculated actions to influence him) and not who she is as a whole, so can we actually say the ML truly loves her? it's all a very clinical look at things, but that's honestly up to the ML how he'll disprove it.
REGARDLESS muh heart hurty over the ML's heartbroken face omg this poor dude </3
y'all i am SO readyyy for that yandere arc lol

i've been looking for this combo with the perfect balance for so long
most BL-themed isekai focus to much on the sex/relationship but none on the fun fantasy world building+ OP cheat aspect of your usual isekai
some isekais just queer bait and hint at deeper than usual relationships between male characters but only treat the possibility of an mxm relationship as a joke or as fanservice.
THIS. this is the kind of plot i was looking for!
us, who've seen it x1000 times: oH nO wHaT cOuLd iT bE??? ;) ;) <3 wE jUsT dOn'T kNoW :) :)
The redness in his face...
cOuLd iT bE FeVeR (⌒▽⌒)