It's just horrible I'm so sorry. Doing that to you in front of kids is abusive to them as well!
Hoping to help motivat you to get the f out of there. The violence always gets worse could lead to your death. This is dangerous to stay. I know the feeling of needing financial support from him. I think that's why a lot of women stay. Please get out of there. Stay at moms. Get on assistance. Request emergency assistance. Please don't be afraid to report him for the violence. But be safe & get out of there!!