It is hard to know how much Russia has been harmed, because both sides probably exaggerate the figures.
I wonder whether "more harm" is the right question. The question should be whether the sanctions have any impact on Russia's war economy, which they do not. If anything, they make Russia more independent and strengthen Russian ties with China and India.
This is all to the detriment of the EU, the only one here who profits is the U.S. by making the EU more dependent.