I (29F) feel like my husband (31M) let me down when I needed him and I'm struggling to let go of it

I'll sound like a jerk if I dont say this first so I'm going to establish that my husband has always talked about how much he hates his job, and hates his coworkers.
Two years ago I lost my job. I was just coming back from maternity leave and it turns out they got rid of several positions while I was gone so it was a huge surprise. I was making more than my husband, had an excellent benefits package, and pension.
My husband has a decent job. They pay is okay but definitely not enough to support our family. He also has no extended health insurance. Because I pay the mortgage and car insurance, I had to find something that made at least a certain amount, and that had health insurance for my son and I. Unfortunately, full-time jobs that pay a good amount in my field are hard to find. It took me three months to find something that worked.
In the meantime, I struggled so much. The pressure of needing to look for the things we would need to get by caused a real blow to my mental health. My self esteem also took a huge hit. I asked my husband if he would consider looking for a better job since he hated where he worked so much and he said no. He did not want to abandon his work place. He said he was worried it would look unprofessional, that he didnt think they'd last if he left, etc. I felt that he chose the well-being of his workplace over me and it made me so much more stressed. His role is a contract position in a management role.
At one point while I was searching, I saw an amazing job opportunity that paid twice what he makes, he was totally qualified, and would have absolutely killed it at the role. I sent it to him and he even said he would be perfect for it....and then didnt apply. To add insult to injury, a couple weeks later he said how amazing he would have been at the job.
Time has passed, I wound up getting a job that I loved., but a contract. Last year, we were told the contract would not be extended very suddenly and would possibly be shuttered with no warning. Needless to say, I jumped ship into another role, also a contract, but more promising. I have been stressed and have had so much anxiety surrounding sudden job less for two years now. I pay a monthly premium for health insurance for my son and I. I think it's really selfish that he refuses to even look for something even though he doesnt like his job or the people he works with. I havent verbalized this to him any time recently, only when it was originally occurring. But I still cant help but resent the fact he didnt step up and I guess make me feel secure when i was at my lowest.
ETA: I want to stress that I didnt ask him to start looking for a job just because I lost mine. One of the reasons i asked is because i realized that the stress of having to find a job that made at least a certain amount per year, plus health insurance, plus benefits, was basically all on me since his job doesnt have extended health care. Its more long term, it means that pressure is still on me. He is still in that same job, the contract is about to end and he still is just content with going back to his old role which pays a little less than what hes making now and said he has "considered" applying elsewhere. I told him he needs to seriously look.
TL;DR: I lost my job, my mental health took a big nose dive and husband wouldnt look for another job. It's a couple years later and I'm still quietly upset about it


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