That is because contrary to what Russia claims, it is not a war between EU and Russia, but between Ukraine and Russia. EU support is there but still minuscule compared to what EU could do.

Ukraine isn't in the EU and the USA has a duty to help Ukraine but doesn't because they (choose your favourite) [have been compromised by Russia] [are too weak] [can't afford it] [don't have enough weapons left because they used them helping Israel commit genocide] [are scared of losing votes for a pedophile] [all of the above]