@WellIWasInTheNeighbourhoo
Id be careful before letting him think you might be wanting to leave. My experience of controlling, dominating men is that they can get very nasty if they think things arent going their way. Do a bit of research into how you could leave first. My ex hid papers and financial information, moved money to other people, made things very difficult for me when he got wind of it.
This.
I was in an abusive relationship for a very long time. I met him when I was 18, and he was nearer 30. That power imbalance you describe was part of it. He hated the idea of me having any real decision making, I was treading on eggshells around him, and stopped inviting people round because he'd grump at having anyone outside the family in the house. He barely tolerated my parents or sibling coming round.
So, I planned my exit on the quiet, got copies of paperwork, found a house, got a lot of help and furniture from my family, who were all so pleased I was leaving at last, etc, etc.
And packed up and left after he went to work one day. He still doesn't know exactly where DC and I live, and they have no interest in their father at all (late teens, so they can make their own decisions, he was abusive to them, too).
I'm happier now, single, than I've been for decades. I've taken control of my own life at last.
OP, from your posts, I reckon you would be happier leaving. And children do adapt.