Suewiththeredford, I am so sorry that you are going through such an incredibly hard time. I don't post very often, but I discovered your thread yesterday, read all of your posts, and saw many parallels with what I have been through.
I had a dh with a big job. I have three children, now adults, but two with SN/ASD. Dh was completely uninvolved, other than taking them out at the weekend. Never attended a single appointment or school event. I worked from time to time but mainly SAHM. Added to this, he had an underlying health problem, and without me to facilitate his big job, and look after him and the children, we would never have got anywhere in life.
Like your dh, he attributed our marriage and our children to my whims, and gradually came to see me, more and more, over the years, as a freeloader. I did have access to money but was very frugal, whereas he was an utter spendthrift, who wasted a lot of money on food and drink, in particular. He didn't want to spend his money on the upkeep of the house, but was, very inconsistently, generous with the children.
I had a horrible childhood, I admit. He had a miserable childhood, I think, but did not admit it. All our issues were down to my mental health, and I basically accepted what he said about everything!
My story differs in that it was him who eventually decided to divorce me, basically because I was a gold digger. Children grown up. It must be so much harder with your young children. But, despite mine being adults, he set about alienating them from me.
Fast forward only a couple of months, dh receives a terminal diagnosis. I care for him as best I can. It was horrendous for us all. Divorce halted, but a new will made to disinherited me, in favour of the children. Executor is one (special needs adult child) who he has totally alienated from me. My solicitor says I have little chance of overturning the will, because I couldn't easily prove lack of capacity, despite the will being made two weeks before terminal brain tumour diagnosis, and dh dying within six months.
I am now living in a home I own only half of, and estranged son could go to court to force a sale to realise his part of the estate.
It does feel that, even in death, he is punishing me for being a scrounger.
I hope you don't mind my butting in with my story. It's helpful to share with someone who understands. But I also want to say that, despite the hell I have gone through, the loss of the son who I always felt closest to, because he was not close to his dad and financial problems around the house, I have never felt calmer and more accepting of myself. My relationships with my other two children are, if anything, better.
I think you said how these situations creep up and you are so right. For thirty years of marriage, I bought into the belief that everything was my fault, because I came from a messed up family. I did and I was. But it wasn't all me. He had issues that he didn't attempt to deal with, whereas I sought a lot of help.
I still love him but I am better now, without him. I hope, and believe, that you will get to a good place in the future.
Thank you for listening and I will follow any of your further posts with great interest, and I am cheering you on.