Honestly, how wonderful it would be if you could just turn round and say ‘oh f*ck off’ when he said he did not understand why you were looking for rubbish jobs.
That is so patronising and demeaning. How much support did you have when your children, especially your first, was a baby? Working full-time with a baby is hard, especially with no support; plus there was - my oldest is 16 - a lot of stigma still around going back to work full-time and putting your baby in nursery.
So instead of actually just focusing on the fact that you have brought up two wonderful children, which enabled him to continue to work, and now that they are getting older, you are finding your feet (well done you, and this is without even considering the abuse as an element because he won’t acknowledge that), instead of saying well done, and thank you for all you have done for us this far, he makes a comment about what you were doing before being rubbish which has sent you into a spiral of self-doubt and denigration about your past choices. I think that is quite toxic and it has made me annoyed on your behalf.
As regards your choices, as I have said before, it is very hard to think straight when someone is constantly undermining and emotionally manipulating you (add in the fog of new motherhood and the demands of small children). Be gentle on yourself. It is important to recognise the situation you are in to focus on getting out of it, not to go down a rabbit hole of self-blame about how you go there. Plenty of time to unpick that when you are out (if you still want to by that point).
Every day is mega-anxiety because he is micro-managing you. He wanders in to see what you are doing - yes he is encouraging but you have experience of when he has not been hence the anxiety. What about telling him if he wants to be supportive that he should leave you to work in peace for x hours? Do you think you would be able to do that?
Be aware of what he is doing but do not let it define your day. Job sounds wonderful - excellent, be proud of that. Blog idea also sounds wonderful, but yes, anonymous so that he cannot snoop. Next step, I think, is trying to get some boundaries around your time so he is not constantly interrupting you. It is not love and support, but control. He is bestowing his approval (at the moment) and making it about him. Which brings me back to where I started on this post.