Hey there DaneJoeCT, I am sorry that all you've received are defensive responses to your totally valid critique. It's disappointing to see this in a space that usually makes you feel like part of a supportive community.
I know what you mean when you say "good fatty story" - someone is fat, but it's not their 'fault', because it's due to an illness or something out of their control. When we set up one group as 'good' we are setting up an oppositional group as 'bad'. "bad fatties" who don't have a diagnosis to justify their appearance, who people can look at and blame self control or whatever else.
Autostraddle and Black Girl Dangerous are places that you might like to check out, both are really good on fat shaming.
Big hugs!