A very good reason to generally attack/dismiss feminism IMO is that it is this morphing amoeba-like ideology. One's personal feminism is always different from 'those mainstream feminists', yet you do not see a lot of distancing from some of the very harmful feminist extremists that are around. ("NAFALT" - not all feminists are like that)

It's gotten to the point where the analogue would be to label oneself a 'stalinist libertarian' (because not all stalinists are like that) or other similar nonsense.