I'm at a loss for understanding the current US government strategy of continuing economic sanctions as it seems to do more harm to the US and help countries that the US is attempting to curb the influence of like China.

(1) Pulling US/European businesses out of Russia essentially created a void for Chinese companies to fill. Now China receives that money while the US and Europe does not.

(2) Russia has managed to already find buyers for oil and gas in Cuba, China, India, Brazil and other countries which will help soften the blow of an ineffectively slow oil and gas embargo from Europe.

(3) Europe and the US are experiencing record rates of inflation while Russia does not seem to be currently affected as badly. I have seen articles regarding Russia not having access to certain supplies but they seem to be making due with what they have.

Russia is consistently making progress in the war while Ukraine loses ground.

At this point it feels like the US is employing a losing strategy and plans to continue on this path. Is there any sort of logic in this strategy or is this just the only thing the US can do?