Dd is 16.
She is a vegetarian, which I don't count as being a fussy eater, but it does remove a lot of things from her diet (also, full disclosure, she's veggie because she hates the taste and texture of meat and fish. She happily eats gummy sweets and jelly).
Things she dramatically hates: mushrooms, all nuts, all seeds, chickpeas, spinach, cabbage, all leafy veg, asparagus, coconut, olives, couscous.
Things she can't eat because of her braces: apples, cucumber, sweetcorn.
Things she turns her nose up at but will reluctantly have a bit if she has to: all potatoes, brown bread, brown rice, quinoa, pumpkin, polenta, eggplant, broccoli, cauliflower, courgette.
We have various allergies and medical diets going on in our family, so cooking is a nightmare and a half anyway. I cheerfully accommodate all of her preferences and make sure that there's something she likes in every meal.
HOWEVER (and this is the AIBU)... a few days ago I was working out what we'd eat and she was a bit glum because it was Thai pumpkin curry (doesn't like pumpkin, doesn't like the coconut milk in it, doesn't like brown rice) and I said that she was quite fussy and she is FURIOUS with me for saying it. She claims that she's not fussy, she "just doesn't like eating some things". Isn't that what fussy is? I don't mind her being fussy - she can't help not liking things. But, surely, she is objectively a fussy eater?