I think yes that is part of the reason that she hated her. I’ve dug into Nesta and I read acosf and I felt like the only time I liked her was when she finally broke down and then when she told Feyre she loved her. I feel like yes Nesta is a realistic character but what she had for her sibling was pure toxicity. I have siblings and we all hate each other’s guts at times so Ik how it works but what I’ve seen from Nesta is that it’s all toxic. This isn’t siblings fighting it’s worse. And I feel like it’s their mother’s fault since she also ignored Feyre. Which caused everyone to ignore Feyre. I don’t like Nesta imo, she never tried to get along with Feyre and I feel like this also makes her so unrealistic. It’s so sad but I hope to see in the next books Nesta and Feyre get along and she somehow in her own way apologizes. Bc for me acosf did no justice for Nesta :/ but I still have some hope for her.