Why is the EU so subservient to the USA?

u/CorneliusSavarin - originally from r/GenZhou
I don't really understand too much of Europe's relation to America. The current situation in Ukraine is clearly not in EU's favor. They would have to deal with refugees, an angered Russian neighbor, expensive LNG from the USA, and possibly more segmented trading blocs that does not benefit them.

Yet Germany just took the boot to the head like a dog. This would have been more understandable when there was no alternatives to the US in the 90s perhaps, but as of today whats stopping the EU from looking out for their own interests and working with RU or CN if thats what they need? Why so subservient? And if so, why not any moves to at least stand up for itself? The EU and the Euro is definitely in jeopardy now.

Is it literally because of NATO and EU has a terrible army? Is it because they don't have any of the technological dominance and shares too much of it's cyber networks with the USA (unlike RU and CN which has their own ecosystem)? I am super confused at the lack of them even speaking up for their own interests...