system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: Hitler could have NEVER won WW2

Although many believe in German WW2 technological superiority, a sub-group of those people believe that by fixing some mistakes Hitler could have won the war. This is absolutely untrue and I'm about to explain why, if I make any false claims myself please let me know so I can change my view.
First of all Hitler's ww2 plans revolved around him getting the sweet lebesraum(living space) from the east. This means that his original tendencies were invading the Soviet Union, while France and the British Empire were just in the way of that. Of course, he had to go through Poland first, which is where most of the confusion starts and that is the Molotov-Ribbentrop pact. A non-aggression treaty between Germany and The USSR. Because of western intervention a temporary peace treaty had to be made. This benefits both countries because 1.Germany's fear of fighting a 2 front war is non existant anymore and 2. Soviets although a mighty force, lack leadership because Stalin had to execute many Generals and other high military commanders in order to secure his place in the Goverment. The pact would give him enough time to get new military commanders on the field and to modernise his army. Apart from that both countries HATED eachother. Hitler was constantly talking about his Eastern lebesraum while Stalin never had a problem displaying his tendencies towards expanding westward. And now the controversial part, operation barbarossa. Most people would say that Hitler lost because he had no oil, or because of American intervention. Don't get me wrong these did play a role In Germany's defeat but the real reason Hitler lost is because the Soviet Union was simply stronger. 2x the population, more tanks, more artillery, larger Air force, 10x more resources, etc. Meaning Soviets had the advantage in both the Short and long run. Yes, Germany was winning in the beginning but that's only because they took the Soviets by surprise. So even if Hitler's attack was flawless he would still have lost. But what if he never invaded USSR? What if he choose to only focus on the west and win the war that way? Well, if you don't want to go to Russia then Mother Russia comes for you. Like I said Stalin would have attacked Hitler when he was ready for it. In Hitler's mind it was better to take a 50/50 and attack while Stalin wasn't prepared rather than take on the full force of the Soviet Union.
gpt
The biggest correctable post-1939 mistake you're overlooking here is Hitler's decision to declare war on the United States after Japan bombed Pearl Harbor.  Public sentiment in the US was strongly focused on revenge against Japan, and while FDR personally cared a lot about the European war, he probably would have had a hard time getting Congress to declare against Germany.  

Even prior to D-Day, American material support is crucial to keeping the Soviet armies moving towards Berlin, and American troops were slowly marching up the Italian peninsula by 1943.

It's hard to posit exactly how things go down without American involvement in Europe, but e.g. some sort of negotiated peace is much more likely.