@erancomics
People tend to like the anime art style because it's visually appealing. It's cartoony yet slightly realistic. There's not just one generic "anime" style either. The Ghibli art style is realistic, whereas most Shoujo styles are very cartoony.
And when I said "unrealistic", I wasn't just referring to their chest size. If these women were real, their legs would be too skinny to support their heads and torsos. Their waists and ribcages would be unable to contain their vital organs either, so I don't think that your art style is "realistic."
I know that there are incredibly skinny large chested women in the world, but they are mostly models, who have had large amounts of cosmetic plastic surgery. Anorexia and other dangerous eating disorders are rampant in the modelling industry, and result in impossibly thin models. There are cases of models starving to death, so, as a feminist, I think that saying that these women are "realistic" is potentially dangerous, as it may lead to normalisation of anorexia.
If you bill your art as stylised, that's fine, but it's just too exaggerated to look realistic, and it falls into the uncanny valley effect, where things look unnerving because they're simultaneously not quite realistic or stylised enough.