I’m so sorry to hear of your and every one else’s pain in this thread. It’s so heart breaking.
I completely understand about not trusting people, I struggle with that too. When the relationship you’re supposed to be able to depend upon the most is tarnished, how can you trust anyone?
But the good thing is, that there are good people out there. So I urge you to keep looking, if you feel able to. Friends, partners, family, whoever they are, there is someone.

I too have the whole thing that my siblings have been treated differently. My mum is proud of them, but me, Im a disappointment. I work in mental health and my mum actually said to me “I don’t know why you work with “those people””. And that is the reason I can never tell her of my bipolar disorder. Even though she knows it’s in our family.
It’s so sad