Probably because the person isn't fat enough in some self proclaimed "shitlord's" opinions. I made a post about a skinny fat a while ago and there were tons of downvotes. More upvotes than downvotes, but still tons of downvotes and lots of comments about how "we are here to hate big disgusting fat people not small fat people" and "it's Ok to be fat if you have a normal BMI". Just goes to prove that there are a lot of overweight fatties in denial here who like mocking morbidly obese people but get "triggered" when they see posts about dad bods or other small fats, probably because they recognize their own body type. If anyone reading this is offended by me saying this, then you need to go on a fucking diet.