Like so many people who read her letter, we only focus on things within our awareness.
You forget that she wrote: “I wanted to die every single day of my life and it took me several years to realize it was because of the environment I was in.”
The reality is she didn’t have a mother like you. And clearly no relationship with her father. There’s a good chance she never got the opportunity to learn those lessons you might have taught her had she been your daughter about hard work, living economically and not complaining in public.
There’s a good chance she was escaping domestic violence, or sexual molestation, or discrimination (if she’s a non-heterosexual cis gendered person).
So maybe you should go back to being ashamed.
Besides, when you read the real story of Stephanie, she doesn’t seem all that virtuous or righteous.