Well, you can only say something like when you've only watched movies from the last two decades.
When you look past the orgy of extremely uninspired Hollywood action movie special effects, the film was a total failure. Its worst offense: It looked and felt like THE MATRIX, but was pretending to take place in people's dreams and their subconscious. The huge problem here is that no human being dreams like this. There was nothing surreal, weird, strange, chaotic, non-linear or even remotely metaphoric - or even artistic - in the entire film.
The very haunting 1971 movie "Johnny got his gun", just to give a random example, did a MUCH better job at exploring the inner workings of the human mind than Inception.
Even when you stick with Hollywood-style movies, THE CELL from 2000 was much better at exploring the "mind palace" of a very sick brain than Inception could even possibly imagine.
Check the RUSSIAN (!) movie STALKER from 1979 or the RUSSIAN (!) version of SOLARIS from 1972. Watch ANY Fritz Lang movie from the 1920s or 1930s, if you want to watch original cinema. Watch ANY Akira Kurosawa movie if you want to see really great cinematography and picture language. Watch Stanley Kubrick's and Sergio Leone's works. Once you've done all that, you cannot respect uninspired Hollywood trash like INCEPTION anymore.
What's really sad here is that Christopher Nolan has proven multiple times that he knows how to direct a great movie. I book Inception as an accident that I prefer to ignore.
