Husband makes me feel like a Single Mom

I do majority of everything - work, bills, home, kids, cleaning, etc and I can’t get much help or support over the last 3 years. We have a 3 year old and a nearly 2 month old. Few days postpartum I’m cleaning up the house and moving things to basement to get house ready for our new born. I’m trying to establish boundaries/routines with my toddler but my husband doesn’t support it. Even our doctor has said we have to be consistent and on the same page. He doesn’t want to put in the work and thinks I’m lazy and can’t handle two kids. How do you single moms do it?!? I need to learn so much from you. Any advice?