Heads up toxic people often used peoples kindest traits against them. Your worry for his well being, so he’ll forever be miserable enough for you to worry about it but never donanything to get better. It’s just to distract your from your own discomfort. your uneasiness talking about his behavior to other people, that means you’ll not get a second opinion and stay isolated in your confusion, and it works you already wonder if you’re the problem.
Your kindness is probably why he follows you to other groups and starts belittling and criticizing you. He knows you will do what he wants and give and give as much as he wants to take. You did start to talk about it tho and start to break out of the role he assigned you.
Guy seems to be big on emotional abuse. I see plenty of red flags there but they are hard to see if you don’t study up on how emotional abuse works.