I think some of the assumptions in OP's opening remarks aren't accurate.
Feminism, even in the days of the suffragettes was not of the left, which is why it splintered. And as someone who became a feminist during women's liberation, there was a very strong "right wing" strand. ie women who believed that the solution for women was to become independent through a "capitalist" approach ie start a business. And in fact for many working class and BME women who were often blocked from self advancement moving into some sort of self employment seemed a better option.
That's why for instance, within women's liberation, some women formed socialist feminist groups as they wanted to look at how women's liberation could be achieved within a socialist frame work.
Because FWR became one of the few places that the issue of trans rights vs. women's rights could be discussed maybe a more diverse group of women joined. Some of them may not see themselves as being particularly "political" and so express opinions that aren't based on some sort of approved analysis of how to think.
I haven't seen any of this blaming mothers, but then I dont go on every thread. I have seen discussions about whether "affirmative" child rearing has created problems eg the snowflake generation.
I have been on threads where I thought that some marks were not just bordering on racism, but were racist, but I said so and then stopped commentating as I didnt want to give any more oxygen to that thread.
But although I agree with those who have suggested if you dont like the topics being discussed start your own, I think that many women on FWR only really engage with a few issues directly relating to trans activism.
But maybe this is because I forget there is a feminist activism board and maybe more overtly political discussion are happening there. Have you tried? This is after all the "chat" board.
But as someone who was part of consciousness raising groups, where you could find yourself with a marxist, a right wing libertarian, an apolitical floating voter, working and middle class, and benefited from the opportunity to find our what we had in common as women, I am happy that there isn't a party line on FWR.
I think politics as a whole has moved right, since the Reagan Thatcher era, and having been and in some way still away a wishy washy middle of the road liberal (with a small l, not the party) now find that what were common views when I was growing up mean I get categorised as left wing.
If you cant persuade women through interacting with them that the views you hold are ones that have value you, you cant just blame them.
Feminism is a broad term. What OP is experiencing is why there is a difference in say the approach of WPUK who are firmly socialist, and over women's groups campaiging as gender critical feminists who feel that because the issue impacts all women, they cant solve it by only talking to and campaigning with women in their own bubble of beliefs.