Why is it evolution is not even and fair between sexes?

Evolution one would think is even and fair between males and females; playing devil’s advocate and going on the line of straight evolutions apart from creationism. In creationism the differences in males and females and their roles are quite defined. Back to evolution, why is the males of the species more than not the fanciest in color, markings, etc as well as being the strongest? Why didn’t evolution make the females the stronger in near 50% of the species? Or why did not evolution make males in some species the one who carries and births the children? If males and females are suppose to be equal in intelligence, drive, capabilities, etc, why didn’t evolution follow that?