Part of this character's design is her unrealistically large breasts. Flagging this picture for that is in my opinion extremely stupid.

It might be bad anatomy if the artist was trying to draw the character realistically. They're clearly not though, rather they're intentionally using an exaggerated style, plus again the character is also normally exaggerated.

Flagging anime art for not being realistic is absurd, and you might as well start flagging a ton of things on this site.

I guess someone around here doesn't like round, plump breasts. What a time.