You’re completely right in your observation

Russia still works with all the cold War strategies like massive meat grinder attacks waves, and yes, terrorizing populations

Ukraine is working like a mosquito, relentlessly stinging Russia in the places that hurt their infrastructure, their economy. Each individual sting doesn’t do much, but all of them together over time hurts bad to the point that Russia as a country may not survive, and all this time they don’t try to murder innocent civilians