So sorry to read that things continue in this way.
It shouldn't be as tough as this to dissolve a relationship due to a basic incompatibility. It's tough because of needing to change living arrangements, to change when, where and how children see each of their parents. It's tough because of the grieving over lost dreams and plans for the future.
It should not be tough because one person is set on blaming and shaming the other for the incompatibility.
You are not to blame for this LR and you shouldn't be needing to go through what you are currently going through.
That same professor regularly reminded us that just because we KNOW that these various tendencies exist in human thought and behavior (cognitive bias, self serving bias, cognitive dissonance, dispositional attribution etc):
doesn't mean we can stop it from happening. It just means we can be aware and more likely to catch it after the fact.
I very much agree with your professor that knowing isn't enough to stop our brains from working in those ways. I think that sometimes it is possible to shift from catching it after the fact to sometimes seeing it as it is approaching and stopping it then.
Developing habits of self reflection should help - something you are excellent at already. Just being aware of the possibility for problematic thought patterns can help to catch them and stop them sometimes. Social groups can help too - being with people regularly who think differently can help. It's possible to change things by doing too I think. Exercise helps, learning new things, doing different things - all gives you stuff to counter your mind's argument that anything good is luck and anything bad is down to you.
I don't suffer from depression but I do have a strong tendency toward anxiety. I've been that way forever. My mum tells me that as a small child learning to walk, I would do things like sit on the edges of kerbs to climb down onto roads. I was so nervous that my brother who is 18 months younger than me walked first. When I was 3 I spent a week crying and unable to sleep because I'd watched a news article about a satellite that was going to crash to earth and I was worried it would land on our house. As a teenager I spent several years lying awake for 2 - 3 hours a night worrying about the house being broken into.
As an adult, I'm pretty much fine. I've never had to take medication for anxiety or sought the help of a counsellor. I'm aware of it as a tendency so I watch for weird worries and try to sort through the ones that are useful and I should pay attention to and the ones that are just ridiculous. Many of the closest people to me are not like me - I'm very attracted to personalities who are much more risk takers than I am. Those people tend to be very attracted to me as well so I have a number of friends that help just by being themselves. I do new things whenever I can too - I think that if I didn't, I'd end up living in a very narrow world.
I grew up with excellent, supportive parents too who never forced me to face fears but just gently offered support and encouragement until I was ready. That has helped loads.
Actually, being a bit anxious and tending towards worrying is useful in my job and has been a strong positive in my personal life too.
It seems to me like you have good people around you and lots of good coping skills. I think that you will come through this time and be absolutely fine. You've always seemed like a person of great strength and compassion to me, somebody who approaches their mental health problems in a way that is likely to help. You already do all of this stuff and I think it helps you and will continue to help you.
Hugs to you - I hope the dark times are behind you soon.
IP