Yes, it's a pity that this woman wasn't better prepared to defend herself against an ex-boyfriend. But she is the victim here, and it is not her fault she was assaulted. Blaming the victim isn't helpful.
"Once the writer in every individual comes to life (and that time is not far off), we are in for an age of universal deafness and lack of understanding."
(Milan Kundera, Book of Laughter and Forgetting, 1980)