I am always gobsmacked by how switched-on some of the younger posters are with regard to abusive relationships on this forum.
I am 'older' ,(53 on wed!) and I have only just woken up to what was going on in my life. Absolute respect to those younger posters who can see what is happening in their relationships and run for the hills with their children before those children are damaged beyond repair by the abuse they witness, or the manipulation by their abusive parent.
It's not the one who leaves who destroys the relationship, it's the one who abuses.
And usually, the OP is asked if the behaviour they are describing is part of a larger pattern, or is a one-off from an otherwise loving partner.
The thing about abuse...from my experience..(as an older person doncha-know), is that it follows set patterns. The only reason I discovered that the life i was living, (which had driven me to suicidal thoughts - success at that would have been good for my children!)was not normal and was in fact one abuser after another, was because I saw behaviours in a partner that I had seen in my parents. I researched these behaviours and found that they are described in detail as personality disorders.
Even if a PD is not the reason, abusers do follow patterns, and these patterns can be recognised by those of us who have experienced these . Spotting these at an early stage is something that is a Very Good Thing, and indeed is now being introduced in schools, which can only be a good thing. This will hopefully break the cycle of abuse, which goes down the generations, as the children are 'trained' to choose partners just like their abusive parent, or their co-dependent or 'martyr' parent.
Had I not 'destroyed my family', I would now be dead, one of my children would have gone on to be an abuser and the other would have huge depression problems, with all that means for their life.
People who state that families must be kept together at the expense of one member's mental health, and usually the damage of the children's mental health too, should just think a little before they spout. You have no idea what the life experiences of the abuser or the abused are, and lucky you that you have not experienced this.
Abuse in families is so complex in many respects, but so simple in others, that pontificating about not destroying families in very unhelpful.
And yes of course my life experiences are reflected in my postings..that's the whole point of a forum isn't it?