No, it was heavily skewed towards Britain and Co. At least their allies were more useful than Austria Hungary.
Germany was defeated because Britain had USA on its side. And one of the reason is that Wilson was an anglophile, thus he tolerated British blockade and manipulated American public view towards anti German stance. An anglophobe president would have protested openly, which would make their blockade fail, and he could treat the Zimmerman as a British forgery.
Next, Britain can only get unsecured loans when US joined the war in 1917. They were basically broke by that time, and only US unsecured loans kept them fight on.
Note that the US Germany relationship before the war was cordial. Without Zimmerman and USW, the US would never join the war.
If the US was strictly neutral and demanded to trade with both sides, Britain could not do anything, and Germany would gain massively. Germany would only buy raw materials, which were non contraband, and exchange their pharmaceutical and optic products for them.
American ship owners could sue to get their ships back in prize court if the British seized them
However, suing the German government for damages when a Uboat sinks a ship, not to mention the inevitable deaths, was not going to happen.
The Germans screwed up and dragged the United States into World War I. One could argue that there was a certain inevitably to it (after all we are talking a global war of attrition) but deliberate German policy decisions were made that resulted in US entry.
There is also the general good feelings toward France (compared to Britain), so it was not just the British who mattered from that standpoint.
The United States did not save the British Empire or Britain for that matter in World War I. Worst case, the French collapse but there was little the Germans could do to Britain by 1917. They certainly weren't going to invade
As to the British (Allied) blockade of the Central Powers.... it was a legal blockade governed by international law. Strictly speaking from diplomatic terms, the US was pretty much required to honor it. If for no other reason than the British officially honored the Union blockade of the Confederacy was precedent (the blockade runners sponsored by British citizens during that war were not official British policy).
The Allies played by the rules of international conduct. The Central Powers did not.