system
Given the following post, respond as if you're commenting on Reddit:
human
[General Time Travel] Why do the Nazis win so damn much?

Nearly every time someone makes a tiny little difference in the timeline, the Nazis win. You could kill some street pastor in New York, 1975 and the Nazis would win.
gpt
The Second World War wasn't as close as everyone makes it out to be. Don't get me wrong, it was a long and brutal war, fraught by mistakes made by the Axis and Hitler, but the Allies had massive population, GDP, and strategic location advantages. 

The reason that it seems that so many timelines result in the Nazis winning has to do with the way time travel actually works and a little project that was conducted in a secret German lab in 1945.

Imagine the time space continuum as a single branch of a nearly infinitely branched tree. When you time travel, you follow that branch backwards to the point you travel to, and your interference is grafted on as a new branch. 

In 1945, a subset of German researchers experimenting on the effect of atomic energy on time space fragility discovered rudimentary time travel. They were unable to choose a temporal coordinate, and instead set their destination roughly using atomic decay as a benchmark. Using remarkably imprecise tools (by "modern" temporal scientific standards, insomuch as such a term means anything), the Germans determined that exposing matter to a temporal flux would result in being pushed back along the timestream. Their hope was that they could send information, troops, technology, or covert operatives back to help win the war easier. They tried everything and spent years and massive amounts of capital sending things back, but nothing in their own timestream changed. When the War went bad for Germany and the scientists had nothing to show for their seemingly massive waste of time and budget, they were ordered executed by Hitler himself. 

In a fit of desperation, they each sent themselves to a different temporal coordinate. They figured at worst they would just die painlessly and be saved the disgrace of execution.

What they realized was that while what they sent back didn't impact their own timeline, it was sometimes a large enough advantage in OTHER timelines to turn the tide of the war. They began doing everything they could in the timelines they grafted onto the continuum to advance what they now recognized as potential Nazi domination of all of time and space. Each member of the scientific team advanced their own atomic temporal project, with alternative reality versions of their coworkers, contaminated local timestreams as much as possible with information, troops, or technology, and tried to win the war in their own timeline. They figured they owed it to their other selves to avoid the Nazis losing the war in as many timelines as possible.

Now don't get me wrong, sufficient meddling in a timeline by a well meaning traveler could result in the traveler being shunted to a reality where that particular meddling made the difference in the war, but most of the time, especially in examples like the one you gave, what you're really working with is a timeline that was contaminated by the original Nazi time travel project, directly or indirectly.