I'm studying applied math at an almost exclusively STEM college. I've taken one history class (European history from 1300-1600) and will not be taking any others.
However, I wouldn't consider my public history education to be "largely a lot of propaganda". I did take the advanced (AP) history courses at a public high school in Texas, and I might have just been lucky and great teachers, but my teachers discussed:
-British/US troops infecting Native Americans with smallpox by giving them infected blankets
-Trail of Tears and how Andrew Jackson was generally pretty horrible to Native Americans
-Wounded Knee Massacre, and in general how much we (as Americans) screwed over the native people
-a little bit about eugenics in the US
-Watergate scandal
-showed us a documentary about how Walmart achieves such low prices by brutal business practices (and has hurt many American companies by moving production to China)
in addition to your points above. I don't feel like my history education (solely from public school) was "largely a lot of propaganda".
One of your examples is about a private business. All but one of the others describe simply the brutality of colonization. It wouldn't be good propaganda if it looks 100% squeaky clean.
Think about what meaningful questions are left unanswered. Why is it that any serious examination of the US' covert wars across the world is skipped entirely? Why is the entire era 1945-1991 painted in communist vs capitalist terms? The US participation in WW2 is reduced to "we saved europe and asia from hitler and japanese imperialism".
The overarching theme is of American moral superiority, unassailable founding principles, and a government by the people, for the people.
None of those are true, and I am thankful we live in an age when access to the writings of accurate historians is just a click away for those who care enough to discover.
I learned about the covert wars in South America. I also learned about the establishment of Israel after WWII, and how US / Allied Forces were involved in that, the Palestinian perspective, the 6-day war and the establishment of Israel as a dominant military power.
The only major stuff I think I missed out on was the history of US involvement in Iran (of which I later learned in College history classes). But global covert actions (and not-so-covert: ie Vietnam War) during the Cold War era was definitely taught to me in general. High School History may have missed a few countries, but I hardly think it was propaganda from my perspective at least.
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The closest thing to "propaganda" I can think of was the Civil War saga frankly. Abraham Lincoln is considered an extreme hero up here in the North, who prevented our country from falling apart. Later in college, I learned that Southerners have a different perspective... even today. Extremely interesting to me.
Also, a friend of mine from Hawaii told me the Hawaiian perspective on the Annexation of Hawaii. Apparently... there is a bit of controversy on that subject in Hawaii that wasn't taught to me.
My experience is far more like your parent commenter's than to yours. Very pro-America, all black-and-white, no need to reason about or analyze murky grey areas or anything that is recent enough to possibly offend somebody's parents (eg Vietnam War wasn't covered). None of that was ever mentioned in my schooling. US schools do vary a lot.
AP is a whole different best for any class, much less history! I took AP US and non-AP World history in high school. The depth and breadth of material covered was just ridiculously, obscenely different between the two. I'm not sure what graduating high school even means these days if you don't have a bunch of AP credits, but it certainly doesn't make you an informed citizen with basic competencies.
However, I wouldn't consider my public history education to be "largely a lot of propaganda". I did take the advanced (AP) history courses at a public high school in Texas, and I might have just been lucky and great teachers, but my teachers discussed:
-British/US troops infecting Native Americans with smallpox by giving them infected blankets -Trail of Tears and how Andrew Jackson was generally pretty horrible to Native Americans -Wounded Knee Massacre, and in general how much we (as Americans) screwed over the native people -a little bit about eugenics in the US -Watergate scandal -showed us a documentary about how Walmart achieves such low prices by brutal business practices (and has hurt many American companies by moving production to China)
in addition to your points above. I don't feel like my history education (solely from public school) was "largely a lot of propaganda".