Stalin and Mao practiced genocide on a larger scale and for much longer. And don't forget Roosevelt, Truman, and Churchill ordered 100,000's of civilians burned alive to. What do think the firebombing of Hamburg or Tokyo did? The atomic bombs? But it's okay, they were Germans and Japaneses civilians, totally different the the German excuse of killing civilians because they were Jews and Gypsies.
And the Axis was not a pushover. Without the aid of the US all of Europe, Asia, and Africa would have fallen under their control. Your argument is the US was better, but why? Because the US didn't start fighting until their opponents had been in a state of total bloody war for nearly a decade. It was the all the supplies from America that kept the UK and USSR in the war, it was the endless tide of red infantry and Sherman tanks that won the war. Never mind the fact that they needed 5 of them for every German soldier or tank. It was a war of attrition in the end.
I didn't mention Mao, Stalin had purges and ethnic cleansing but not like Hitler and the level of which the Germans were doing (nor the scale they were planning to do after triumphing over the Slavic untermensch). The Allied leaders made some bad decision which could be categorized as war crimes but again, it was nowhere the scale as the Germans nor the Japanese. The atomic bombs were used to pressure Japan into submission, otherwise at least 100k+ American soldiers would have died (+Japanese soldiers and civilians) if they decided for invasion of the Japanese mainland, this brought swift end of the WWII but sure it is grey area. I never said that the Allies or the Soviets were blameless, they too have innocent blood on their hands but not nearly as much as the Germans and the Japanese. Also, don't put words in my mouth, I never said it was ok to kill Germans for the lulz or that the other side is blameless.
The Axis weren't a pushover, didn't say they were. Without US support Britain would have taken serious hits but it wouldn't have been enough to force them to capitulate, German invasion of UK was never going to happen because of the Royal Navy ruling the waves or the channel in this case which the Germans needed to cross. As for the land lease to the Soviets, it did help with Soviet logistics (US trucks were awesome), otherwise it didn't really change the war at all, it merely speed up the German defeat by few months. Well fk it dude, don't start a war with the most industrialized and populous country/ies next time perhaps? The vast majority of the German loses (80-90%) were on the Eastern Front where the German loss ratio to the Soviets was 1:1.3. So no, the endless masses of the Soviet 'horde' didn't win the war despite what Hollywood shows. They didn't need 5 Sherman for each German tank and... really 5 tanks for every German soldier? In a tank vs. tank engagement, the Allies always achieved victory when they held a 2.2-to-1 numerical advantage or better and were on the offensive while the Germans, despite being on the defensive and having heavier tanks, needed a 1.5-to-1 numerical advantage to ensure success. Take the Sherman and Panther losses during the Bulge, in order to meet the mythical Panther kill ratio, the Panthers needed to have killed 900 Shermans because they lost 180 Panthers. The First Army only lost 320 Shermans total. This isn't even a 2:1 kill ratio in favor of the Germans because so far we've only counted the Panther losses - and the Germans lost many more other tanks like the MK IV, Tiger, etc (their total losses were around 600 tanks and SPGs). Not to mention that most US tank losses were not even necessarily Panther kills - the majority were lost to ATGs and panzerfaust kills. If we take "unserviceable" tanks into account, the "kill rate" is even more catastrophic. A total of nearly 310 Panthers would have been out of action, compared to 425 Shermans out of action! That's not even 1.5:1, which is the weight ratio of the Panther vs the Sherman. Finally, the average daily strength of the First Army was about 1,200 tanks fighting 400 Panthers. That's a 3:1 ratio in favor of the Shermans and well below the stupid idea that "it takes five Shermans to kill a Panther", much less the even more stupid notion that the Allies "lost five Shermans for every Panther".
At the end it was a war like any war, it was a war of logistic. Logistic always win wars. Except if you are Iraqi in the 90s.