It's sorta' come up at work occasionally, one of my co-workers mentions they wish there was more focus on the positive stuff in US history every once in a while, and it's, just.
Just about every thing I try to think of is tainted, at best. Nothing colonial or western expansion counts, 'cause it was built on the back of a genocide campaign, nevermind everything else going on. Slavery and everything supporting it was a fucking abomination. Very few military actions would count, despite there being something or another ongoing for basically the entire existence of european colonization and subsequent succession and statehood since. Reconstruction was defined by what amounts to a successful terrorism campaign, substantively failing as a project. Civil rights is conflicted as hell 'cause for all its successes, it was defined by the massive opposition to treating your fellow citizen with basic goddamn respect and it's continued to be fought and undermined to this very day. Basically friggin' everything we've done south of the border is some variety of atrocity.
New Deal was probably closer than most? Maybe? It had major problems of its own, though. The list just kind of... keeps going. American history's kind of shit (and it's largely not even particularly unique in that, blech). What the blazes is actually there, that doesn't have to be whitewashed to hell and back to look good?
There's days it feels like every history lesson we teach in primary school really should just be "Holy fuck kids, do not be like your ancestors, for the love of whatever god you care to invoke." Just repeat that over and over and over again until it sticks, because good goddamn is our track record just kinda' terrible.
Whole damn species needs to have a metaphorical come to jesus moment and internalize that sometimes your great-grand whatever or whoever was actually just kind of a terrible person and you don't friggin' have to make excuses for them being an asshole. They were just an asshole. You don't have to be like them, you don't have to venerate them, you can be okay even if whatever spawned you was more or less a sack of ambulatory crap. History being shit just means you know what not to do.