You can't homeschool and work full-time. It's impossible and unhealthy for you, FM.
And this: It's a 180: I didn't express enough appreciation for H in our M and I realize now how damaging that was. He still is working very hard to pay for the home where I live and the food that I eat. He is not playing financial hardball with me (yet) so I do have reason to be grateful.
Oh well. You need to strike a balance with this. Stop beating yourself up about the past. He also did not express enough appreciation for you. And he pushed having kids. Now he wants out of all of the above. Stop feeling guilty for decisions and actions and dysfunctions that you were only fifty percent of.