Hi, I'm still processing my ending a 20-year marriage with a man who has GAD, and was hoping for some feedback?

I watched over the years as he saw an increase in panic attacks and anxiety, which blossomed his ADHD and OCD tendencies and a drinking problem. He quit his job and called me unsupportive when I said he needed to look for another job -- it was 2 years of him being unemployed when I asked to see a couples therapist. The therapist gave up on us because he spent almost every session yelling at me.   I urged him to seek help, but he tried a few therapists and said they don't help, and he bought a few self-help books but they didn't go read. Every day, I was walking on eggshells, couldn't do anything right, hated that I was not "happy with him." My friends said that the yelling and the refusal to work was abusive. When I told him this, he called me abusive, and that I would use that in a future custody battle. 

We stopped going on dates and inviting friends over, because he was just so irritable. We didn't have fun anymore. I  learned that sending him articles and "helpful hints" just made it worse, and eventually I  just kept asking him to figure out how to get out of this spiral, because our relationship was in trouble. Our finances were a mess, and in the end he couldn't stop himself from yelling at me and calling me names in front of our daughter, and for me that was the final straw. He was affecting our child, and he just became unable to live with. 

We calmly parted, despite still feeling love for one another. He moved in with his sister, who isn't charging him rent or anything.  It's been about a year since the divorce, and he sees our daughter weekly for an hour or two, but I tell him he can see her as much as he wants. During that time he shares with her his struggles with his health, tells her "funny" stories about how his dad also suffers from GAD and is terrible to spend time with. And he continues to tell me how overwhelmed he feels about operating on a daily basis -- insomnia, fear of COVID, and the Internet and online gaming seems to take up his days. He says he needs more alone time to heal, and seems to be withdrawing from her. 

He believes that he can "will" his way to get better while alone, with time, and doesn't need therapy, and is opposed to meds, but he also seems to be resigned to his problems. I want to help him, and have pointed out that he may someday end up like his dad, who he avoids because he is just so unpleasant to be around. He recognizes that may be his future.

Meanwhile, our teen daughter is quiet about it all, but I can tell she misses her relationship with her dad. I fear what this is doing to her, although I am not seeing anything alarming. She also told me that I'm better off without him. I try not to discuss too much of what's going on with him, but I think he is oversharing. He's also worried about COVID, and so he doesn't want to see her too often, but he also isn't doing any online chats either. I sense that he may feel embarrassed that he has failed her, and so he may be avoiding her. 

He and I are still communicating, and frankly it's better now than when we were married. Is it possible that I can convince him to be more positive when he sees her -- I'm afraid if I do, he'll withdraw even more. Should I keep trying to encourage him to see more of her? Is there anything I should be doing to help my daughter? Help him?