Then, Matt Damon happened.
For me, the appearance of Damon's character, Dr Mann, was as unnecessary as it was surprising. Mann is basically a jerk whose purpose was to ramp up the drama. He was one of NASA's first team - a member of the Lazarus Mission - to explore this new galaxy and habitable worlds and was waiting to be rescued, but behind all his annoying philosophizing, Mann is a bad and cowardly man.
Yet another lesson about humanity's ineptitude, thanks Nolan.
As if there wasn't enough drama - you know, exploring black holes, alien worlds, the meaning of life and multidimensional theory - we needed Matt Damon to create some havoc.
Damon's character, who obviously isn't that smart, eventually has a tangle with the Endurance's airlock, which triggers a sequence of events that leads to a scene more at home in the "Fast and Furious" movies.
I was exhausted by this point.
Gravity, Meet Quantum Physics
Then came the central idea to save humanity: we must reconcile gravity and quantum dynamics. Yes, Interstellar went there too and, if I'm honest, I was excited about how Nolan would deal with it. Cue: the black hole dive.