I agree, I really didn't get drawn in by Interstellar much at all. Although I only watched it on a home "theatre" and not an imax blow-your-mind "experience", so maybe I missed out on something that the bigger screen would have given me?

It's just weird that a rapidly-falling-back-to-agrarian society scrabbling for resources would also be able to secretly maintain such a high-technology base. I was waiting for a 1%-esque hidden society to be revealed leeching off the masses or something.

I'm not sure what the agrarian bit meant, I felt like it could be dropped without losing much of the film. I would have believed a dying Earth with every effort thrown into trying to colonize Mars, but Martians get cancer and the colony keeps failing or something. Then we discover this wormhole with what looks like Earth-like planets right on the other end! I could believe we'd throw a lot into a last ditch effort to find a planet we could live more easily on.

I probably over-thought it :)

Whenever I hear that a movie needs a theatre with a screen larger than the Arecibo telescope for the public to enjoy it, I already know that's a bad movie.

All the other things you mention are spot on, too. Simply many science fiction movies lately have stopped making any sense, as if (as if?) the public was completely unable to tell the difference.

Not to mention the fact that they instead of fighting it, they want to build gravitational propulsion, all by themselves in a secret location, to transfer humanity somewhere else. Like, low hanging fruits.