Of course there were historical inaccuracies. One thing is that Matt Damon should have eaten a lot more kielbasa before portraying the corpulent General Groves.
It’s probably a good movie, as inaccurate as it might be, so we’ll get it once on DVD. My background is nuclear warfare, including how nukes are built, so this is something of interest to see how accurate it might be. Oppenheimer usually gets far more credit than he deserves, and, in fact, in school he was rarely mentioned at all since so many others contributed more than he did. Countless people made significant contributions to how the first bombs were created such that naming them all would take the entire movie, so a movie is good because it at least might portray the effort, thinking, and challenges those involved had to go through to succeed. The politics were nothing short of dizzying, with so many communists that had to be involved.
It’s like the TV movie series, “Sons of Liberty”. It was highly inaccurate, but seemingly right on concerning the mood and types of things that happened that drove the American Revolution.