@Binglebong
I find it puzzling that they didn't touch on straight boys and girls who still felt the need to trans. On my mind it is usually the expectations being put on them by the world, although there probably are some genuine GD. They are a smaller cohort, often autistic, and I don't want the forgotten about.
Maybe they just felt they couldn't really speak to their experience?
I think that's how it should be really, rather than these block-lobbies that claim to speak on behalf of huge groups of people, like women or non-heterosexual people or black people or many other groups. We might group together with others we feel we have something in common with, to talk about our views and experiences in a public discussion, but we never represent everyone and shouldn't try to. What's important is that people get to contribute on the way to finding a way forward, even if in the end the decision doesn't go their way, it will hopefully have helped us find the best way forward.
As far as this "denying my existence" stuff. I think what people mean here is that others are denying their identity category. Since they see their identity as who they are, they see it as a denial of themselves.
It's a very unstable mental construct to hold up a persons' sense of self, but one that modern life seems to encourage in some way. It's pretty much the opposite of most ideologies and philosophies that look to root people more firmly, which suggest transcending categories like this is the way to stability.