Obama's first few budgets were the result of the worst financial crisis since the Great Depression. After that faded, the last four years of Obama's presidency saw deficits that Trump's budgets will far, far outpace. God forbid there be a recession under Trump.
Clinton ran a surplus, and Carter's deficits were a fraction of what Reagan would spit out.
I agree that the Dems are not very concerned about it, but they certainly aren't "particularly bad" at it compared to Republicans.