I'm not going to argue that one lot of people get 'worse' abuse than another. But please do not minimise the insults/criticism/abuse thin people get just because fat people get them too.
Since adolescence I've had insults and abuse aplenty because I happen to be tall and lanky. At school people called me a Shire horse because of my height and long legs: shouting at at me, snorting like a horse etc. I've had the Addams Family theme sung and whistled at me and been told I'm Lurch the butler. I've had kids throwing things at me on the bus while shouting about how weird and lanky I look, 'like an alien'.
After I met my DP's parents for the first time, his mother asked him if I was anorexic. How insulting to me; and how much more insulting to people who are. She clearly had no idea what a person with anorexia actually looks like. The ignorance and presumption is astounding.
People sneer 'you're so skinny' at me; laugh in my face if I mention how hard it is to find clothes to fit and give me their own tales of woe about buying clothes while being fat (side note: often these people are not what I'd call 'fat' at all).
People tell me, if they see me eating an apple, 'No wonder you're so thin if that's all you eat', and in the next breath, if I'm eating a biscuit, 'It's so unfair you can eat like that and stay so thin.' Well, which is it? Plus, how fucking rude and how on earth do they think they know how I eat? I'd never say to a fat person eating a burger, 'No wonder you're so fat if that's all you eat'; it might be their first burger in a month (sometimes the apple is my first apple in a month).
I do not accept that there is no 'venom and spite' directed at thin people.