Almost 100k combined gross income and a little return.

My husband and I combined almost made $100,000 last year and we got a little return from the federal government and we owe the state? What gives Why is it that people who are married and have a dependent get so little back compared to single parents? I'm not hating on single parents It's just that it's frustrating. Married people with children like money too that's all I'm saying. Plus on top of that as high as eggs are I think everybody needs a break. Maybe we should start filing separately I don't know.