I have a couple questions. These are what I would ask myself. Posting answers isn't necessary.

You said if I can get him to go to couples therapy... what is your plan if he refuses to go or downplays the the argument? What does that behavior tell you? What does his refusal to want to go tell you?

It's a shame that he hasn't changed very deeply and still relying on his abusive behaviors. And now, your gut reaction is telling you to run again. I think you deserve a happier and healthier relationship. Relationships aren't just 2 people. It's 2 people in a specific and unique set of circumstances that constantly changes. The people need to navigate those specific things as a team. Does his lack of deeper change tell you anything you need to know? Are you functioning as a team with mutual respect and goals?

It's none of my business and I don't know your recent mental health issue beyond hearing voices. That certainly is an unusual stressor for a relationship. I can understand financial concerns and job worries having an impact on going back to work. It sounds like you are forcing yourself to go back though. Returning to work will eleviate stress for your husband. Will returning be what's best for your health and wellbeing? If your health doesn't improve beyond the point you are at now, your relationship will stay affected by the stress. How would you cope knowing your husband may stay stuck in unchanged behaviors he's refusing to discuss at the moment? What is your expectation and is it realistic?

I don't need answers to these questions. I know from personal experience that women who are or have been abused get tunnel vision and we forget to look around a little. I hope you look around a little and put your entire self first. You deserve a happy and healthy relationship.