yeah, that's kind of my point is that we're legends in our own minds regardless of whether we actually deserve it.
the version of events America sells its people is that we were a kind and benevolent superpower who got involved because we wanted to fight injustice and spread freedom, so we jumped in and singlehandedly saved the day. it's a patently false version of events from start to end, but that's what we're fed, and lots of people buy it hook, line, and sinker.
and it kind of makes sense we'd perseverate on it because it's one of the only wars in "recent" history that we were involved in where there was such an exaggerated "bad guy" and there WAS an actual liberation aspect, so it's a lot easier to get people to buy into this idea that we did it for noble reasons (especially if you're selectively ignoring/not teaching the less flattering things like Nazi rallies at Madison Square Garden, or refusing to take in a ship of refugees knowing our refusal could send them back to a country where they would face certain torture & death, which we ALSO knew about well before we got involved, etc).
when I was in elementary/middle/high school, we spent a lot of time learning about the Holocaust, which I think is very important to learn about, but when it came to the rest of that era, what we got basically boiled down to "so Hitler was doing all that bad stuff and we said 'excuse me, sweaty, we're AMERICA and we won't stand for all that naughtiness,' so we joined the war and saved everybody, oh yeah we did drop a couple of little bombies on Japan but they totally deserved it and everyone was so glad we did, the end."
curricula were less standardized/uniform when I was in school so idk if that rings true for everyone here, you occasionally got more if you did advanced placement courses, and once you get to college/university, you could take entire courses that just focused on WWII rather than it just being a small unit to get through in a few days or weeks on top of all the other history, but overall the standard version of events that most of us are taught is very heavy on the pro-America propaganda. outside of the Holocaust, we make the whole thing about ourselves, and in many cases the Holocaust education is as much if not more about setting up that narrative.