Why is misandry often considered to be non existent?

Through my travels over the internet I have come across many people who think misandry (the hate or distrust of men and boys) as something made up by MRA's and in their minds other male supremacists. Their main reasoning usually comes down to things like patriarchy and male privilege usually stating that if it is not coming from those in power then it does not count. But surely hate is still hate right?