Can you add pictures about the snake and the setup?

There's been many changes in his life recently, so it's really kind of expected to have problems with feeding. I am guessing that the snake is not feeling secure and that the situation has now escalated. If I were you, I would place him in the tub for few months, just to get him to feed. When he feeds steadily, then you can try to put him back in to that terrarium.