I can help you today.
one of the things you can do is to help yourself understand the your daughter's personality by going to see a therapist yourself. No matter how much love you gave her , as an adopted child there are abandonment issues (by the birth mother) that she may feel but never addressed.
If she make everyone feel "like walking on eggshells" when she is around, she may have a personality disorder and you might want to read the book "walking on eggshells" which will probably describe her, you'll recognize her in the book and there are suggestions on how to "live" with this type of person.
I am sure you did an excellent job raising her and loving her. Unfortunately she needs to address her psychological issues and hopefully she will.