I think it isn't helpful to characterise it as a failure. In an ideal world we would have a treatment that would resolve the distress without someone needing to make drastic changes to their body. But for me personally, I never managed to find that solution.
As far as I can see my mum is happy now. She was very distressed in the beginning, and it is possible she is still hiding unhappiness from me. However, I feel I am generally quite an intuitive person, and we have such a close relationship that we can read one another like a book. I think I would be able to tell if she was still unhappy about the situation. My mum was distraught by what happened to me when I was younger, but it is what it is and the only option was to find a way to come to terms with it and move on with our lives.
I know my life seems very odd in many ways, but in other ways it is very mundane and normal. I talk to my friends, spoil my dog, watch rubbish tv and have goals and dreams I hope to accomplish.
I can't deny that I crave the experience of a romantic relationship and I hope that is something I can have in the future. I do wonder how my life would have been had I not made the choice I did. However, I wasn't able to see another way forward, and despite everything, I am happier today than I was before.
I don't think it is accurate to say I am delusional, though you are entitled to your opinion. I have never believed that I am biologically male, I simply have always possessed a deep desire to be so.