You guys seem to think that Republicans will suddenly roll over because the Dems have the House, and they'll play along with whatever fantasy scenario you've dreamt up.
Here's the thing: the opposition has their own priorities and their own plans, and their motivations aren't the same as yours. You think that the Republicans also view this as about the shutdown and making Trump look bad, and that they'll act accordingly, but they're not going to do what you think they should do, because that's not what this is about for them once the House is seated.
You think McConnell cares that the Repubs lost 40 seats? He's seen both chambers flip back and forth numerous times over the last two decades. Hell, there was a Democratic supermajority in the Senate just ten years ago. He knows it's a divided electorate. He knows the pendulum will swing back. He knows there's a core electorate for the Repubs that's still big enough to matter. He knows he has a massive propaganda arm in Fox News that'll gear up to oppose Nancy Pelosi, just like last time. He knows Schumer is a dish rag who'll compromise on anything to get a "win".
He knows that all that matters is the power that you have right now and using that power to get what you want. As long as he's Senate majority leader, and as long as there's a Republican in the White House, he's going to exercise every option available to him to extract concessions and launch the opening salvo in the new campaign of demonizing Pelosi and the Democratic House.