tmz : Oksana Grigorieva says she was sabotaged by her own lawyers in her settlement with Mel Gibson — and wound up with a TERRIBLE custody agreement … and now she’s suing.
TMZ has obtained legal docs, filed by Oksana herself (without a lawyer) … in which she accuses Ron Litz and Daniel Horowitz of negligently advising her to sign off on a bad deal back in 2011.