Anime What's something you dislike about your favorite anime?

personally, the biggest problem i think neon genesis evangelion had is the... i don't know how to word it other than "lack of nagisa." frankly, it's not like i have a particular attachment to him in either the anime or manga, but the end of his plotline is supposed to be an emotional moment for both shinji and the audience. he was in the anime for a single episode, i just feel like it is very hard to care about him due to how little exposition he was given in the adaptation.
what's something you criticize your favorite series for, or think is something you think they could've handled better? i'd love to hear your thoughts on this!