I agree with Nichole, that was very well written and heartfelt, Zythyra.
In my opinion, there isn't only one transition.
The transition. Any change is a transition, from one stage of your life to another, and the overall goal of being comfortable with oneself, whatever that may encompass, should be the overriding concern.
I would venture that you, Zythyra, and other people that walk this path in life, don't 'de-transition'... you simply make
another transition, since you are not exactly the same person you were before. You become someone more than you were, someone who has gained a whole new set of experiences that have given you a perspective that you didn't have before. It's a further step towards understanding yourself and who you are.
Where's the failure? To have the level of self-awareness and depth of character to decide that this new transition is one you need to make in order to be who you want to be... that's a success in my book.

There's no shame in wanting to be yourself. There's no shame in wanting to live your life in a way that you will feel most comfortable with yourself and with others. No matter how many different transitions that takes, physical and mental.
The choices of the individual are theirs and theirs alone. It changes nothing with regard to the journey anyone else takes in life, and I don't understand why there would be a stigma attached to the process. As long as you are a step closer on the road to understanding yourself then I say good for you.