All the replies are saying is due to misogyny, male insecurity and hate etc.

That's right...after over 10-20 years of using "incel", "virgin", "male fragility", "gammon", "centrist dad" and "misogynist", as an insult against pretty much any man who makes even the most gentle criticism or counter argument against feminism , apparently having one term - cat lady - for what might be deemed a "female loser" is grotesque and hateful.