Not all women are 'nice'.
It's not uncommon for women who are with men who turn about to be violent etc have stuff in their background that has meant they don't see it as that odd.
Plenty of male abusers escalate slowly and do things to reduce the woman's ability to see the wood for the trees.
I have no idea about these people they just sound from this info like a pair of nasty fuckers.
I think that informing girls about what's normal, red flags, different forms of control, etc is important.
The boys need to be educated too because in the end it's blokes who commit the majority of violent crime.
Putting it all on girls is only half the picture to my mind.