if Russia can’t even win against Ukraine how would they ever fight against the EU, our army is both larger and much better equipped then Ukraine

Yes, if Russia invades EU then all gloves are off. But in the more immediate and near term this is about military production, which Russia is in full production capacity while the West as a whole is kind of just tip toeing. The former is already outproducing the latter in artillery munitions by a wide margin. The EU produces even less than the US in military. Even though the EU became the biggest aid sponsor of Ukraine, much of that aid is non-lethal forms like finances, food and logistics. The US still provide the biggest military help to Ukraine.

Even if there is a war between EU and Russia, fact of the matter is that Russia already has the initial military production advantage over the EU, because the EU downsized and underestimated Russia’s plan of aggression for years.

I think what the EU-US trade deal was about is outsourcing the military production to US, while the EU ramps up their own. After all, the key message from that deal is that the EU will invest in US military production.