The border deal is a bad one, but it’s also a symptom of a larger problem - there aren’t any mechanisms for passing funding for important things (and aid to Ukraine is important) when the party with the majority in the legislature has no interest in actually passing legislation.
You try to give them the thing that they want to pass the other stuff, but the GOP doesn’t actually want anything. They’re a perpetual opposition party with no actual agenda beyond “we’re here to make the Democrats mad”.
It was a sad day when I realized so much of what the Founders built was resting on the idea of "People won’t be assholes… right? They’ll run for office because they want to govern… right?"