It's bizarre, the old female-on-female ranking n' rating for attractiveness/competitiveness takes a number of pathological forms where actual use of that attractiveness (as in gaining a mate or getting widespread social approval) isn't even the point, as anas are generally sexless things who retreat into a weird childishness and generally utterly repulsive to general society anyway.
There are a couple of severe older adult ana cases in my town. One looks seventy plus at first glance, although she's probably 30-40 years younger, and totters around 'running' ie. lurching forward unsteadily like a drunk while wearing gym clothes and a backpack any hour of the day and night - I used to come across her regularly while out for walks. Thought she must have died, then I spotted her in town the other day just lurching about looking as horrifying as ever. Truly skeletal face, sunken eyes, sunken cheeks, hatchet jaw, skin seriously discoloured, legs the size of a primary kid's lower arms. It's a testament to the human body and modern medicine that she's still alive.
The other isn't quite such a bad case but looks ill as fuck. Stick legs with the huge joints, sick-looking grey tinge, to her skin, thinned out hair, the weird furry body hair thing they have going on, just unpleasant. Nobody, but nobody with a shred of mental wellness or even decent aesthetics would ever envy such women. Every single physical feature that makes a woman attractive to anyone is destroyed, scorched earth-style by anorexia.
I don't think the fatties really think anyone envies their bodies, but the ana crowd do. The former seems to dervive their stupidity from defensiveness and egotism, the latter are just six fucking sheets to the wind and thoroughly, sincerely delusional the way untreated, unmedicated schizoids are.