tinsel I think they have an idea of who they- it may be organised, sucessful etc. an idea of where they are going- I am just about to do x, I am giving up smoking, I am moving on in my career, I am fixing my house
and then the reality- which doesn't quite live up to the ideal.
I think this applies to all of us but for a FW the gap is often wider.
they also have some inflexible ideas that they cannot let go of- mine believed the following things about himself 'I cannot change (but other people will if I make them), I am right, I cannot (not will not) finish things, the world is fundamentally unfair to me, regardless of what I do my family must stay loyal, I should be the most important person in my life but also in my partner's too.
My FW is his own religion.
They have to reconcile the gap between what the idea and the reality and the easist way to do it is to blame someone else.
They also have an idea of who and what you are that does not match with your reality. You will also be blamed for that.
If you question either their idea of you or of themselves you are interfering with their self made reality and they don't like it. You are making them unhappy. So you will be punished. Because it is inconvenient for them not to have things the way they have dictated they should be.
Mine would say things were my fault. somtimes I would sit him down and get him to admit that I either had not done what he said or that e.g. his DIY was not my responsibility. he would admit this. Then two weeks later we would be back to the same thing. because it CANNOT be his fault.
It is also a learned bahviour based on what has worked in the past. Because in the moment they will say anythign to get their immediate objective which is victory at any cost. and if they are caught out their response is to deny, deny, deny.
I have even heard my FW telling his dcs to do this- if you get caught, just deny it and keep denying it. I did try to point out to him this is not a good lesson in life to teach them. the lesson should be, don't do it in the first place, but if you do do it, face the consequences and learn from it.
You need to let go of this idea (that there might be a reason) because if you are still looking for the cause, you are also looking for a cure. it is not your job to fix him.
in the end...it matters not what the crocodile bites, only that it does.