Many female posters on this board consider themselves women because they are adult females and this alone is what makes them female. We belong to a category that is determined by sex. We think this category is important for the purpose of ensuring females/women can be included, respected and protected. The moment you, OP, are included in it, it ceases to be the same category.
Many on this forum believe that the only limitations/ restrictions/ expectations that should be experienced as a result of being an adult female (women) should be those that occur for immutable sex-based reasons.
We fully reject any gendered expectations and we want the impacts of being female - both the biological and the gendered expectations addressed (take a read of Invisible Women by Caroline Criado Perez).
In light of the above, do you not see how undermining your stance is of our position. It's not a matter of being unkind, bigoted or deliberately excluding. Suggesting TWAW compromises what we are seeking to achieve for females/women. It is about what we want for women (females) it's not about trans people.
Reading your posts, I have a lot of empathy for you and I do think that more needs to be done to ensure you can live in society free of stigma and distress. I'll happily join campaigns for third spaces and to try and obliterate gender norms and expectations so males and females are not limited or damaged by them . I will also support more research going into treating dysphoria, so people don't have to live with the crippling effect of hating their sexed bodies.
What I can't accept is a single category of people that includes me that is based on gendered expectations. I want to abolish gendered expectations and so absolutely refuse to be in a category that imposes them on me.
I don't think you should have to endure stress, humiliation and risk by being forced to use male spaces and to be simply viewed as being in the male category (despite this being the case, I know this is distressing for you). However, the solution must not involve females/women having to endure stress, humiliation and risk from males being included in our sex-based category and spaces.