A person who has such high levels of distress or lack of emotional regulation that they cannot manage by themselves the level of emotional turmoil they experien

A person who has such high levels of distress or lack of emotional regulation that they cannot manage by themselves the level of emotional turmoil they experience sounds... like PTSD, which uh, yeah, she has PTSD and this was a known behavior that he presumably chose and accepted when he was dating her. It makes no sense to date someone and then actively neglect their needs, even if their needs are greater than people who don't have a severe, chronic illness.