I'm sorry for the seemingly rotten experiences you had with your church leaders and members and am sorry you do not feel you can believe in it anymore.
That is where you and I differ it seems. My belief and faith is in no way conditioned or dependent upon the actions of either my church leaders or the membership. They have nothing to do with my faith. For me, it has everything to do with the confirming witness of the Holy Ghost. Had I not had that, and other revelations, then there would be no grounding for my faith, but because I have, my faith and testimony of the LDS church stands independent of my good and bad relationships with others.
I know of other transgendered members (I know several now) who are not having negative experiences with the church, those for whom the leadership took the General Handbook of Instruction was taken as a guide book - as it is intended. These leaders looked at the person, their heart, their feelings, their individual testimonies, listened to the Spirit and chose not to pursue excommunication, and in fact these trans-persons remain members today.
You seem to be angry with the church, and that is alright, you believe they have trampled on you. I wish you the best of luck in your new faith - Wicca. I know there are plenty joyfully waiting and ready to receive you. However, if you at one time had a testimony of the LDS faith, consider its basis, and then ask yourself if perhaps you still have it somewhere. If so, pray to determine what it is that you should do - pray for the guidance of the Holy Spirit, seek to repent of your sins (and for clarification I am not including transsexualism - it is not a sin), and see if God will not direct you. Perhaps you might rediscover the same faith, that same peace, that once led to you to the waters of baptism.