Eating disorders by definition are psychological disorders characterized by abnormal or disturbed eating habits. Usually people think of anorexia or bulimia, but never veganism.
All forms of dieting are eating disorders, because they involve limiting oneself from a certain type or quantity of food, for purely psychological reasons. The only exception is if the diet is recommended by a doctor, but even then it’s still a physical eating disorder. Food allergies and obesity are both physical eating disorders.
Veganism is usually driven by a political ideology. If you let politics interfere with your eating habits, there’s truly something wrong with you. And if you’re so obsessed with your health, that you read count your daily nutrient intake, you should probably go see a psychologist.
Being a vegan doesn’t make you a good person. There are no moral consequences in eating animal products. You may think that rabbits are cute, or you may not like the idea of ending a life, but that’s no excuse not to eat meat. It makes no difference whether the rabbit is eaten by you or a cat. If the rabbit dies of cancer, it’ll surely be more painful than if it dies from the quick stroke of a knife.