@Butterscotchcloudstangerine Oh OP, I am so sorry that at least for now, this is your life.
I am another one who understands. I know, and at last I can accept and be honest with myself, that this is what my now 10 years late departed Dad was like.
My also very sadly, late departed Dear Mum, was such a strong woman, but she didn't leave my Dad until after I was married and had children of my own. I can only hope that my father's mental cruelty did not lead to him ever also physically harming my poor DMum - I do think that she would have left him if he had, I certainly hope so.
My children are all adults now, and I still can't let them know exactly how mentally cruel my dad could be. That is partly to protect them, but also - awfully on my part - to still partly protect the memory of my father. He had an awful childhood after his DDad died when he was 7. His mother was cold and distant with him, and had always preferred his older brother. I am pretty sure that she didn't, and couldn't have, blamed him in any way for his DDads death - he was gardening, got a scratch, and died from blood poisoning.
My dad had almost worshipped his Ddad, and suffered from both, what he at least took to be, rejection from his mother, and the lonliness of missing my Grandfather so much. I honestly believe that my dad was what appeared to be a functioning adult, who also had at least one mental health illness. He was literally a lunatic, as whenever his behaviour got worse, it was always around the time of a Full Moon. But looking back now, I believe that he also always had very low self esteem, even though he had a brilliant mathematical, and academically problem solving, brain.
I think that I must still feel more sorry for him than I do angry at him. I genuinely don't think he could have stopped himself even if he had wanted to.
However, everyone outside of our immediate family, thought he was very funny, and very helpful. After my parents had both died, and my Mum's brother too - my adorable uncle - his wife could not believe me when I told her a tiny bit about my Dad, because she had never - in almost 60 years - seen that side of him. I only told her the small general insight into my Dad's behaviour because she kept on asking me about my DMum, and why she was like she was.
I am living in a much less, but slightly similar situation with my husband. However, I am certain that my husband would be devastated if he thought he had any similarities at all to my father. I am very, very tired, and finding life very difficult to cope with at the moment. Thank goodness for my DChildren and my absolutely adorable DGrandchildren.
I am also so very sorry for all the other Mumsnetters who have, or still are, living with one of these men. I wish that I had any sensible advice to offer; all I can offer is a huge virtual umbrella hug xxx