While Finland lost, the difficulty the Soviets encountered during their offensive was noted by the powers at the time. It was another factor convincing the Nazis that invading the Soviet Union wasn’t as terrible and idea as the balance of resources and forces would suggest.
Historians still debate whether the Soviets intended to conquer all of Finland at the onset of the war. While the eventual peace treaty left Finland ceding more territory than the initial Soviet ultimatum demanded, Finland retained its sovereignty, which was incredible given the disparity in military power and the existence of a puppet Finnish communist government.
American hegemony was a conscious American policy choice. We didn’t want the Euros having an independent foreign policy, we wanted them reliant on American military protection. This was how the US kept those bits of its empire in line.
Notice how the only Western European country that even pays lip service to independent action is France, the one Western European country with a military capable of independent operation. And then we get “Freedom Fries” and all that shit whenever they don’t do whatever the current US admin wants.
The single biggest thing Trump fucked up for the US was pushing NATO countries to spend more on defence. This will drastically reduce US influence over the continent in the coming decades, speeding up America’s worsening diplomatic isolation.