The problem with Nolan's films isn't a problem with him or his movies, it's the problem with American audiences. This is now a time where people want:
- Comedy
- Simple
- Lighthearted
- Fast-Paced
- Silly
Christopher Nolan provides NONE of these things.
The films that provide that list of criteria are Guardians of the Galaxy, Big Hero 6, anything by Marvel Studios, Transformers, Fast & Furious... That's just the world now, and that's the mass audience.
Nolan's problem is that he's trying to make big movies with mass appeal. He should stop doing that. People either don't get it, they don't care, or they're bored. He needs to make small, independent movies and reach out to a niche crowd instead of trying to please everyone in the world.
He needs to pull a Darwinism, basically: He should do his own thing, completely off the radar, and certain people will flock to it - but not everybody. You either go or you don't, and there isn't a $200 million budget at stake. That's the whole reason why Following and Memento put him on the map in the first place. Unless Nolan straight up does a big dumb comedy, his career will be in decline, and it's starting with this movie. Interstellar truly is a masterpiece, but most people don't really care about stuff like that anymore. Most masterpieces that are made anymore are released during Awards season which were made for a tenth of the budget of Interstellar, and nobody in America sees those films because they're written intelligently and treat cinematography and acting with extreme importance.
In short: Nolan is playing to the wrong crowd. He's making the wrong movies for the wrong people. He needs to make small movies for smart people instead of huge movies for the masses.