I don't believe anyone is actually trans. I don't believe in gender souls. I don't believe anyone is born in the wrong body.
So when TRAs say "you're denying the existence of trans people!" they're absolutely correct. I deny any of this is real or legitimate.
It is entitled, manipulative, misogynistic behavior grounded in solipsism and narcissism. It is abusive bullying disguised as a faux human rights campaign. It has no basis in objective fact. It is illogical, unreasonable, and impossible to defend or support. It is a flimsy excuse to destroy and hurt women. It is mental illness in a frilly dress and lipstick.
Trans identity is anything but factual or legitimate—it simply does not exist.
It's misusing the word 'existence'. Nobody is denying that a transgender person exists as a person (assuming this is about an actual person and not about a character in a story, of course). What is being debated is the question what it means to be, say, a man who identifies as a woman. In other words, does a man who has transitioned now exist as a woman? And that is what the demand is, to be validated in this manner.
But the problem is that if that person is now a woman, then the definition of 'woman' fails to include the basis on which I am one: my biological sex. So this transitioning person demands to redefine 'woman' for everyone, and if that is not allowed, then he views it as denying his existence.
I am very tired of the catastrophizing language which is the most common type TRAs use. Everything is transphobic, everything is anti-trans, even the gentlest questioning results in some trans person on the other side of the world to be murdered. And yet the same TRAs completely ignore the erasure of women's rights and even all names for our biological sex.