https://www.reuters.com/world/europe/russias-ryzan-oil-refinery-halts-operations-after-drone-strikes-sources-say-2025-01-27/

One of Russia's largest oil refineries.

It's not hard to stop Russia. Blow up their economic infrastructure, and (ideally) kill the staff working at these plants, and their economy will collapse and the killing will stop.

War is expensive. Russia can't fight without a profitable economy.