Oppenheimer is a good movie; I just didn’t like it.
It’s about physics, but has no physics. It’s about war, but they never show the war. Occasionally references are made to troops dying in the Pacific theater, but those troops get none of the passionate intensity of the victims of the A-bombs. There’s no question about whether or not the bomb will be built. You never question the outcome of anything. This is partially due to the chronological discontinuities, but the result is that the outcomes are all foregone conclusions.
But that’s how movies work, unfortunately.