I wanted to ask, "what exactly is 'radical' on the Left?", but I think it's very clear that you're coming from a viewpoint that is pretty well steeped in right-wing propaganda.

There is a fundamental issue at play here with your starting argument, which is the labeling of an affirmation of existence, e.g. "trans women are women" as an ideological position. To argue anything else is, by definition, to deny their existence. If trans women are not women, then they are not trans women, ipso facto. Denying someone's identity is, no matter how you cut it, a position of dehumanization.

If I told you that you are not actually whatever gender you identify as, and I got enough people to do the same, you'd be rightfully angry and upset. That you clearly do not have to contend with that reality makes it clear why you are apparently comfortable taking that stance towards others.

There is no 10 / 10 / 80 division of power or ideology; there's literally no factual basis for claiming that 80% of people are politically unaligned. The only purpose in that fabrication is to make a "both-sides" argument a la "Enlightened Centrism". Right-wing anti-LGBT ideology is a massively powerful and widespread influence, that encompasses most of the religious Christian populace. To claim they are somehow equivalent to the ~2.5% of people who are LGBT+, or that the pro-LGBT Left are actually 10% and the anti-LGBT right-wingers are 10%, is ridiculous.

Lastly, the most basic, core tenet of Feminism is "equality between genders". If someone believes that any tenet of feminism advocates inequality between genders, they have fallen prey to right-wing propaganda. If that equality is either threatening or unacceptable to someone, it should raise a ton of eyebrows.