I would not be so quick to assume you have no case. You have been the primary child care provider and bearing all the costs associated with the child (which is bullshit, by the way). Those facts tend to matter in family court! You should absolutely have a long conversation with a lawyer about this but please don’t assume you’re screwed before you do your research.

A very normal outcome here would be that you’re given full custody and he’s forced to FINALLY take some financial responsibility for your shared child.