If you took the book "Mad" as a romantic, that's on you. Do not tell the author they are romanticizing anything, when you're the one reading and deciding upon yourself. It's clear the book was not meant as this romantic love story, filled with happy endings. It's just like the Joker and Harley Quinn, that's not a romantic story, but we flipped it into one.
Second, author's aren't made to educate you on anything at all. We are not here to give you 1000% accurate information about what we write about. If you want to be educated, go listen to people tell their stories that actually suffer with any of the mental illnesses that were listed.
Author's aren't here to educate you, they are here to entertain you.