My father was toxic. He literally had no redeeming features. He pursued my mother when she was practically still a child. He stripped away her family, her friends, her pride, her self worth - everything with words, actions and fists. He did the same to his children. One of my earliest memories is of my father hitting my brother with an iron for some trangression.
He beat us - we were taken by my grandparents when I was 7, but I still remember knowing that school holidays were coming and being scared for them because during school terms he could only hit or whip you around the body or back of the head, but when there were weeks to heal anywhere was fair game to him.
He used to build us up by being nice for a few days before Christmas. He'd let clueless relatives come to visit and bring us gifts. Then when we just about believed him he'd smash them. Or sell them. Taking them from us because we didn't deserve them and because he could. I can remember my sister crying because she was made to watch him play with the toy that our Aunt had bought her. She wasn't allowed to touch it. Then she had to keep her eyes shut as she wasn't good enough to look at it, but she had to listen to him play with it.
Our maternal grandparents were forced to agree with him that their daughter was a useless piece of scum if they wanted to see us. He drove them away by laughing at them because they were too weak to protect their child.
He stripped everyone around him of every ounce of self worth and dignity. He once assaulted his own mother on the hall landing and called her names because he believed she was pregnant when she married. He destroyed my mother - from the age of 13 until she died at 30 she was assaulted by him in some way that took her to the point of being so scared she'd hit us to stop him hitting her.
He still impacts us because my siblings have picked each other apart. Each needing to be the 'good' one because the good one is the safe one. His father died young having been put through untold stress watching his son become a monster and fearing for all our lives.
How else do you describe a person like that other than toxic? Sometimes it fits. Sometimes people deserve dehumanising terms applied to them because they are monsters.