Absolutely 10/10.
I don't know why anyone didn't think it was engaging. If you look at all the 1 star reviews it's a 5 paragraph long essay and in the end they've said absolutely nothing other than "it's bad". A load of gobbledegook.
I watched it on an IMAX and unlike those unfortunate people who made the mistake of sitting in the front rows for an IMAX film I actually got a view of the movie. The jump cut techniques and quickening pace of the tense scenes and soundtrack were portrayed excellently. I think some people weren't quite ready for the level of the tension and literally walked out because the film was too scary. And no, the movie is not entirely about the nuclear bomb. As informed by the title, it's actually about a guy called Oppenheimer. Meanwhile, if you somehow found this boring, please consult with the other people leaving 1 star reviews because it was too tense and quick for them. If you didn't find it interesting, my guess is that maybe the film isn't for you and you should watch something else.