Sides too far apart is OP claim. Real causes for failure:
Demonic European evil in support of collapse.
Objective and Russian reality is that US provoked Ukraine war through coup and nazi puppetry. That Europe needs to double down on its propaganda support for US war, is a function of CIA controlled democracy that created EU leaders, and so consistency in evil even as US directly threatens EU, and a preference for misery, social austerity, and collapse provides a reason for Europeans to support their rulers tyranny/championing for war on Russia. The Europeans are already fully programmed for CIA agenda.
Peace in Ukraine requires Ukrainian demilitarization and denazification. The obvious demand to make of Russia is to also demilitarize. Instead of Russophobia and warmongering that continues to see Russia outproduce the entire west militarily, and over double Europe, EU could focus on useful production and prosperity.
In fact, the path to destabilizing Russia, is through peace. It's exceptional economic strength during the war will face a tough transition to peacetime economy. Deep corruption in EU would prefer losing a war, than losing power from its hard fought demonic identity.