This just seems like a red flag to me. I don't know the details, but I think it is a situation that bears watching. I agree with the daddy/daughter date idea! Just be aware that people who talk about things like hating the world, or death and things like that can be at a higher risk for suicidal behaviors (and this TOTALLY may not be the case, but it's better to be safe than sorry!). I would keep a close watch on it. Ask her about it... "Why do you hate the world right now sweetie?". But that is totally up to you how to handle it. I would just treat it as a red flag, and give her some TLC! Just don't let her start using this kind of behavior to act out and start getting attention that way. Just my 2 cents.
"Counsel with the Lord in all thy doings, and he will direct thee for good; yea, when thou liest down at night lie down unto the Lord, that he may watch over you in your sleep; and when thou risest in the morning let thy heart be full of thanks unto God; and if ye do these things, ye shall be lifted up at the last day."