Mm...I am well acquainted with your kind of suffering. The loss of innocence, the darker half. It's something I still struggle with, to find some method of integration in my daily life. Or if that turns out to be impossible, to give adequate time for both the human and the dragon to do their thing. It's hard to say what the best course of action is to take when one's true self is so wild and terrifying.
But I can at least tell you that the first step is to stop hating yourself. People don't always understand why I am the way I am, or why I say some of the things I say. Most of them don't really get my deepest motivations, at all, though they may claim to. I feel it may be the same with you and your Self. You can't hate yourself with only a fragmented sense of your past.
Heheh..it's kind of ironic that you lament your humanity being taken away. You have something now that you didn't have as an angel still in service, total freedom of will. This is what it is to be a mortal soul. You should feel lucky to have the opportunity to lament your sins. This is how we learn and grow.
As for innocence and purity? Hah! Weak roads for the naive. You're stronger than that. We all feel like victims to the world, but you know, there are many beings who are suffering a lot worse than we are, and they don't have nearly the opportunities that you and I do to improve their lot. There's a war on the horizon, so I suggest you drop the self-pity and rekindle that fire in your belly.
I will leave you with a quote from one of my favorite novels, Steppenwolf:
"From the very start there is no innocence and no singleness. Every created thing, even the simplest, is already guilty, already multiple. It has been thrown into the muddy stream of being and may never more swim back again to its source. The way to innocence, to the uncreated and to God leads on, not back to the wolf or to the child, but ever further into sin, ever deeper into human life. Nor will suicide really solve your problem [...] You will, instead, embark on the longer and wearier and harder road of life. You will have to multiply many times your two-fold being and complicate your complexities still further. Instead of narrowing your world and simplifying your soul, you will have to absorb more and more of the world and at last take all of it up in your painfully expanded soul, if you are ever to find peace. This is the road that Buddha and every great man has gone, whether consciously or not, insofar as fortune has favored his quest.”