Nobody, darnit

I may be missing the point entirely here, but why does she need good, destructive neuroses? She already sounds like an interesting character to me. My advice would be to start with what you have and perhaps let the more eccentric traits develop organically. I don't always know everything about a character when I start writing. They're kind of like meeting a new friend. I learn more bit by bit and sometimes they surprise me. I've tried it the other way (planning all their habits and quirks), but it always comes out forced and unrealistic. Sometimes events in the plot will bring out traits I never knew were there, and that's where some of the neuroses/weird conflicts will appear.