Men aren't failing to grow up - women are. "Power women" are neither. They're just narcisistic sadists who have grown up surrounded by a PC culture that coddles their immaturity. What passes for adulthood in "power women" is actually the neurotic group dependencies of teenagers. Real Men are fine - and will have nothing to do with these creatures. In return, the creatures want nothing to do with real men, because men call them on their endlessly manipulative sh!t.
"Power women" are cruel because they are so weak. Above all, they are terrified of real men, and so they spew endless insults and disrespect at the very concept that they exist - all while huddling together at some bar, pissing and moaning about how alone they are. They're utterly lost, and completely pathetic. Feminism has destroyed them, and they don't even see it. Their only value is their reliably Democratic vote, as profoundly psychologically dependent and frightened sheep - which is exactly what they were designed to do, through careful planning, by their "feminist" controllers.