Oppenheimer is one of the few movies where I seriously considered just leaving before it even ended because I was so bored. And I wish I did because by the end of it I was pissed that I spent that much time watching it.

I must have looked at my watch about 20 times wondering when it was going to end.

I feel like most of the recent Christopher Nolan movies have been extremely disappointing. His movies now basically consist of 2-3hrs of tension building that lead to nothing.

(And that trinity test was pathetic.)

I'm surprised that's what your experience of it was. To me it was about his hopeless (arguably naive) struggle to do what he thought was right and true in a time where both truth and morality were mostly becoming weaponized in service of alignments of power. He thought he could thread the needle only to time and time again have simply been used by others to further their own agendas, leaving hurt bystanders in his wake.

I somewhat agree that an hour could be cut out, though I don't exactly know which parts.

I knew Hollywood would ruin it and I actively avoided seeing it.

Now that I know how it was ruined I don't need to watch. Maybe in 10 years I'll ask AI to do a "trololol's cut" for me and I'll watch it.