Are people seriously complaining about the breast size of the main character? Fucking hell people, sorry, it's not the 90s or early 2000s anymore where anime girls the size of Yoko Littner are considered absurdly big titty monsters. The needle has moved. People will and often do draw anime girls with breasts far bigger than this, complaining about this specific character is really weird and comes across as petty to me.
It's not realistic? Firstly, her chest size is far from beyond the bounds of reality, even putting aside implants and whatever else. Secondly, who cares? It's a cartoon character deliberately drawn to appeal to people who like breasts around that size. You know that cartoon characters often have unrealistic proportions, right? You know what is way less realistic than the breast size of the main character? Eyeballs that look to be about four times bigger than real world ones, but I don't see anyone complaining about that or weird eyeball enlarging medical conditions.