I dont think they aren't listened to because some may be promoting marxism or any other supposedly leftish view.
The problem is their tone. And it isn't just the groups like Actual Gender Critical Left and some who come on FWR, its every where. If you every watch any of the tv news slots where they have commentator discussing the newspapers you will see it there.
They are all so self righteous. They sneer at everybody, They radiate a self sense of their own intellectual and political superiority. And they rely on extreme, usually irrational and unprovable allegations alongs the lines of, if you think that you are stupid / a nazi / been hood winked etc., etc, to secure their arguement
Added to which they actually dont anything that is of any value to anyone else, ie engender a group approach to solve a share problem. Everything just comes down to masturbating their egos in public.
So KJK makes them irrationally because she doesn't have intellectual pretentions, and then to add insult to injury, she allows "ordinary" women to have a voice, when they know that "ordinary" women should be sitting meekly listening to this self selected elite either online, or sitting meekly in rows whilst they pontificate from a platform.