And I'm sure you've been just as livid about the Democrats spending the last three years refusing to participate in that process and thereby forcing the Republicans to either pass continuing resolution after continuing resolution or else shut down the government, right?
Different thing entirely. A failure to agree on a straight-up budget places both houses at fault (with the People eventually deciding through election who has the better core philosophy as to budgetary direction.)
The Republicans know that they don't have the solid position on which to make a budgetary stand. They can sell sweeping generalizations, but when it comes to nuts-and-bolts cutting of actual programs, they don't have any ideas that are either salable to the American people or that don't contradict what put them into office. To make any significant reductions they need to cut back on Social Security and the military, and they can't do this. So they have nothing to respond to Democratic ideas except the hopes that platitudes will keep them going. So they keep caving, and keep complaining, hoping that their complaints cover up the truth that they have no ideas.