For me the problem is mostly her mental age. With Hoshikawa Ginza District 4, the kid (forgot her name) didn't *act like a kid. She was really mature for her age and she was the one making all the advances toward the adult. The adult was doing her best to be a responsible adult (resisting, setting up boundaries, etc) that made me feel more comfortable with their relationship.
This one is like the opposite. Even though it's a smaller age gap, it feels a little off since you see Mimika being the one lusting (I exaggerate) after Yuzumori, who doesn't seem to have an idea of what's going on.
Other more "problematic" series are pretty hardcore so you get fewer readers and commenters in the first place. People reading them know what theyre going into and understand that the lolicon porn isn't something to take seriously.
But wait! This story is also not meant to be taken seriously! It's just a gag manga! Yeah that might be true, but people generally discuss non hentai manga more since theyre actually reading it for the story instead of for the sex.
Anyway stuff are meant to be discussed and no one here is doing it in a rude way. Most of us started reading it not really knowing what we were getting into since all we were given before were cute short teasers. Now that there's a clearer picture people will leave if it's not their thing and there will be less "ew this is creepy" comments.
Of course there will probably be people (like me) who will continue to read it anyway since we like to read every single yuri series released whether or not it's trash. (Trash in general...I'm not calling this series trash specifically). Even then the ew pedo comments will stop anyway since I think most of us made our point clear and it'd get boring talking about the same thing over and over again.