Many people who have a problem with the name feminism are nonbinary people, who want equality but have been excluded from the movement by enbyphobic women, AKA TERFs.
I assert that the quantity of nbs who hold this opinion is so small as to be negligable and that ceding a major right wing talking point for gender equity for nbs (a group in which I, and the majority of my social circle are a part of) is mostly just ceding a right wing talking point.
Put another way, the idea that "feminism" is an insufficient term is tantamount to "all lives matter".