Please consider going to the Kent Regional Justice Center and getting a protective order to keep this person away from you. That will give you time to contact the King County Bar and see if you qualify for help from the Family Law program. They don't take everybody but they might be able to help you.
The only thing in your narrative that really worries me is the drinking. People who are drunk should not be caring for newborns. You can ask the Court to restrict his parenting until he sobers up. But his other issues . . well, there are plenty of people with no business sense who are nonetheless good parents. But persons without licences should not be driving with kids in the car.
Hope this helps. Elizabeth Powell
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