I can totally identify with this. I'm black & live in the UK where things feel really rough for LGBT+ fat and black folks. I also used to identify as Polyamorous too, but recently stopped. I wrote about it here:
That Loving Feeling is Gone Racist white folks... | Blogging in Shadows

I just want to say that we aren't the problem - Colonialism, Racism & Heteronormitivity is ingrained in many people, so the closer your proximity to whiteness, straightness & body ideals, the better off you are, even when it comes to love. I'm just sorry that people treat us this way, like we're less deserving of love or affection. I ran away from my violent abusive family decades ago, and I'm still having problems forging friendships/relationships with others, but I know that I have a lot of love & acceptance to give.