I think I would put couples counseling on the table and her in therapy and on meds if needed. , either she agrees or you need to start to figure out how to separate. Sometimes push comes to shove..

I’d insist on a baby sitter or whatever child care during that hour you need for counseling often a counselor knows of good child care for clients.

You just deserve better and trust me your baby is picking up on the negative feelings in the home.