Any time there are bigger than average tits in any VN, there are people always complaining/hating on them. Different people like different things, not everything is meant for you, maybe the dev themselves like huge boobs. It doesn't make sense to bash on something which is not to your preference, something which you won't ever play or support; please don't spread negativity and just leave the thread, let those who like it, enjoy it in peace.
Yes they are too big, yes they are back-breaking, yes they are unrealistic, but it's also a fetish, and fetishes are not something that everyone can collectively comprehend; we're wired to like the things we like and there doesn't always have to be a reason, which also means we're incapable of fully wrapping our heads around why some fetishes are desirable. But, you don't need to understand a fetish/kink to respect other people and their preferences, it's basic human decency, and we're all adults on this site, it's the least we can do.
If you said "I don't like Small Boobs/NTR/Furry/Gay" on their respective threads, you'd get your comments deleted or get shit on by other people who like it, I don't get why huge/unrealistic boobs are the only thing which receive open and free scorn. It's a fictional VN, realism need not apply, it's purpose is to be enticing and entertaining, and these two are subjective. If realism is what you want, please leave this site, because 90% of the stuff here is unrealistic; live your real life, look at Porn and Reality TV shows, however realistic even they may be.
Can't we all just live and let live, and fap/schlick in peace? On this site, there's something for everyone.