I think the relevant part of the rant is this:

But here comes the issue. The same people who will cry pedophilia and use the “1000 years old” mock line for Loli characters, are usually the same people who then will also cry pedophilia when it’s a girl with a completely adult and attractive design, whose ID says she’s 17 at the point the story happens. This is an hypocritical double standard. Either the relevant thing is the fictional age, and as such the 1000 years old loli would be Ok; or the fictional age is irrelevant and what matters is the adulthood of the design, which would make the 17 yo girl totally Ok, since her body is that of a 20+ yo. You cannot have it both ways. You cannot pick and choose when to apply one standard or the other. Choose one, and stick with it.

Kukuruyo's rant is very long (1726 words, 9455 characters) so i'll have to drop a link to the website if you want to see the rant itself, I don't want to flood the activity page since this website only limits 1500 characters per comment