IMO, a certain annoyance towards the opposite gender is just natural and inevitable. After all, we all feel the need to be loved by the opposite gender, but that need is seldom nourished, or in the way we want. Hence resentment.
OTOH, I agree that rabid resentment towards a gender (even your own) is a clear sign of an unbalanced mind. As is any visceral hatred towards a specific group; it's usually a projection of one's inner turmoil.
Too bad Western society is mostly absolving towards misandry while being fiercely adverse to misogyny. It's "feminist equality", I guess. ;-)