Because it ruins a series that has had girls as young as 16 in it since its inception. In all seriousness though, it is probably because they are an easy target to put all the blame on.
Probably since they overshadow the OGs now, DOA6 story mode was basically all about Honoka, Marie Rose and Nico and the ninjas barely had any screen time which I think was foul. And then you have weirdos like project Jill who glorify/fawn over the lolis and say they're the "queens" of doa when Kasumi has way more relevance than all of them.
I have no issues with people who like the lolis since its who they like, but I think it's bs when they suddenly are the poster girls when Kasumi is literally the OG face of the game, and then people like PJ gas them up and shit on the OGs as if Marie Rose did anything really of relevance in the story besides cry and befriend Honoka
"then you have weirdos like project Jill who glorify/fawn over the lolis and say they're the "queens" of doa when Kasumi has way more relevance than all of them."