"Christianity" has harmed many people because it's adherents are fallen and imperfect beings, who, no matter hard they try to practice fidelity, will always fall short of the model; Jesus Himself. On the other hand, true love and care from Christians have also helped untold millions over the years, including said Christians.
I think losing pride means not looking to self to define what is right and wrong, recognizing that the Creator and Lord is the moral arbiter, not me. Acknowledging that I am fallen and cannot save myself or others. Not trying to place my self higher or even to God, or be my own god. Not losing sight of who truly creates, forgives, and saves.
I am not sure where the idea that an LGBT person cannot be part of a Christian community comes from. A Christian community is made up of sinners, including me. My sins don't relate directly to LGBT, but I have other sins. All of us are welcome to be part of a Christian community, but such a community will and should challenge people to examine their lives, point out sin, and encourage them to let go of that sin. Not only is that healthy for individuals but the community as well.
As for women not preaching; that is not a universal direction. The passage you are probably referencing; 1 Corinthians, 14:34 was a letter specifically to the church officials in Corinth, it was basically a total mess with no structure or leadership. The Bible is very clear on the importance, value, and equality of women.