Actually you are quite wrong. Mr. Putin is not a stupid man. He understands and knows that US does not have the capability to provide NG to Europe, and as much as you want it to, this WILL NOT change any time soon. I know you will disagree, but just watch. This will not change any time soon.
When it will start changing, the world will be that much closer to WWIII. Everyone knows not to back a snake into a corner. You gotta give it room to "breathe". Every smart politician knows that. Too bad the current president is not a smart politician.
Speaking about the war.... No, Russia can not "beat" US, but it can certainly destroy it a hundred times over. Lets not go there. It's silly. We studied this all the way back in High School if you actually listened in your History class. It's called "Mutually Assured Destruction", and it's this idea that keeps the world at an illusion of peace all these years.