The EU depends (currently) on Russian gas more than anyone else and, despite sanctions, still buys gas from Russia and directly finances the war against Ukraine. That will change with the arrival of warmer weather, but winter is still present and the EU has no choice but to be in this situation.
Another thing is the EU's exports to Russia, which in 2020 amounted to $89.75 billion, which is the lowest since 2016, and far less than in 2012 or 2013. From this point of view, we can see that exports from the EU have decreased significantly (around 50%) in the past 10 years.
It should be emphasized that Russia is a market of only 150 million people, which is more than twice less than the US (330 million) or the EU, which has about 500 million people, so I think that Russia is losing much more in the current situation than EU&US. All these companies that withdraw from the Russian market will undoubtedly lose part of their profits, but data from 2018 say that about 40% of Russians live in poverty (data from 2018), so most people are poor and live on very little money - while on the other hand, a small percentage of people enjoy immense wealth.
How poor is Russia? According to Rosstat, 18.1 million Russians or 12.3% of the population were living in poverty in 2019. That at least is the national average, but the poverty level varies widely across the 85 federal subjects – between 5.6% and 34.7%. The ‘poor’ are defined as those who live in households in which total income is less than the legal minimum subsistence level that constitutes the lower threshold of what is considered essential for physical survival. In 2021, the country’s monthly subsistence minimum is set at 11,653 roubles (approximately US$157 as of 1 January 2021)...Taking this subjective subsistence minimum as the baseline, almost 40% of all people in Russia lived in poverty in 2018.