The GDP of EU is 20T. 10 times that of Russia.Russia GDP US$2 trillion
UK GDP US$3.5 trillion
France GDP US$3.1 trillion
Germany GDP US$4.5 trillion
Italy GDP US$2.3 trillion
U.S. GDP US$28 trillion
As you can see the US has more than double that of UK, France, Germany and Italy combined. It has funded a majority of the war effort. Zelenksy must realize that. If the US walks away he cannot rely on Europe solely.
I think EU can very well support Ukraine and hold its own against Russia.