Misandrist feminists couldn’t be more on-topic if they tried, since it’s their actions that provide the vast majority of the fuel for feminism’s perception as a misandrist movement. They, as members of the movement, define it far more than external factors like ‘men who hate women’.
In that case, maybe you should’ve replied to the post itself to argue that ‘men who hate women’ can’t possibly define the movement, rather than this long defense of feminism and how only the majority of the movement can define it (which isn’t entirely true either)