You are the one claiming Russians are children, but with different words. You say Russia has no choice, but you are also claiming the American response is a strategy to prolong the war, as opposed to, say, the natural reaction. So in your telling, Russian behavior is compelled and mechanical, utterly lacking agency, and the US is, somehow, from the other side of the planet, the one with agency on how the war goes. That is a child and an adult.

Pawns are the players not making choices.

I don’t think that; I think instead that Russia is being foolish and contemptible in prosecuting an unjust and insane war, and is surprised to find out the world isn’t playing along. They are adults and they are responsible for their actions. And obviously the war is their action.