Also those were artists deliberately breaking the rigid rules of realist classicism and finding inspiration on Asian art. Renoir was criticized by its figures "with skin and clothes obscenely stained with what seems dirty greasy oil spots" but the big point was to trigger controversy and to flip the bird to the classicism of the "real" professional artists.
But it’s not the shapes of the bodies that I have an issue with, in general. (Apart from the whole cherubic, gravity free aspect.)
It’s the fact that the faces are terrible, featureless, ugly, often scarily unsettling and clownish, the heads are poorly proportioned, the eyes often dead or doll-like.
He painted out the realism of women just as they were demanding equality, IMO. In the real world, women were demanding better pay, better work protection and votes; in Renoir’s world they were often overgrown insipid cherubs, no evidence of angst or really any kind of inner life. His paintings of male faces, largely, are grounded in more realism even into his late era.