https://www.statista.com/chart/27278/military-aid-to-ukraine...
25% comes from the US, but if you order by GDP(second graph), US is fourth. So overall a very big contribution, but far from "all". And about "negotiations" specifically, you're simply wrong - the ones keeping an open line with Putin (for zero gain so far) are Macron and Scholz (both say it's with Zelensky's approval, and he hasn't disproven them so they're probably not lying).
Raytheon Technologies, General Dynamics, Northrop Grumman, BAE Systems, Lockheed Martin, and Boeing are getting the bulk of that $40 billion.
We don’t talk about Iraq of course.
We are all helping Ukraine because it's the right thing to do (being invaded by a genocidal regime is not a nice thing to happen to anyone).
That's one of the stupidest misconceptions Americans have about "Europe" (the EU).
The EU has a mutual defence elements to it. The EU has a nuclear power, France. The EU doesn't need the US, your "tax dollars and (horrifically broken) political system", and should stop relying on it ASAP. Trump showed you can be an incredibly unreliable partner, why risk it?