Dear Athena,
I know well what you're saying. I look at myself and I have all kinds of flaws. No need to list them all, but here's one example. Very thin lips. A woman (i.e., a REAL WOMAN) has thick lips, right? I mean, look at Angelina Jolie's lips. How can you be a REAL WOMAN if you don't have lips like hers?
Well, you can. I was in a pub once, and there were some young women there for a hen party. One of them was a gorgeous young redhead, and didn't I feel envious, since I'm a redhead myself. So, as you can imagine, I was looking her over (discreetly, from a distance), and what did I notice? THIN LIPS!!!!! Oh, my God!!!! She can't be a REAL WOMAN! She's got thin lips!
Except that she was of course a real woman. Look at real women carefully, and you'll be hard pressed to find a one of them who doesn't have some sort of flaw, something that a REAL WOMAN isn't supposed to have.
So I don't like my flaws any better than you like yours, any better than any woman likes hers. But we all, trans or cis, have them, and we have to live with them. And they don't invalidate us as women, you know.