It would be a Misandrist. The noun would be : Misandry. Hatred of men.
If misogyny is the hatred of women, what is the equivalent word for the hatred of men?
Menopause?
Childbirth labor?
Lol, feminism
It's misandry, as others said. "andr-" means "man" in Greek, and "gyn-" means woman. That's how you can remember it. Like "androgynous" literally means "man-woman".