Let me make sure I've got this straight:
(1) Sue-Z here is mad not at her own daughter, but at her daughter's boyfriend for coming out as trans?
(2) And at the boyfriend's mother for affirming her son?
(3) And at her own daughter for living with and supporting this person?
Sounds like the daughter still loves them if they're living together 7 years on. Enjoy your bitter loneliness, Sue-Z Homemaker.