Am I being really dumb for not understanding it?

There was just an overall feeling of WTF throughout the whole film. Not that that made it a bad thing or a bad film, as it was incredibly interesting and I probably won't stop thinking about it for a long time. I just didn't know what the fuck was going on.

It was funny and sad and confusing and I couldn't take my eyes away. Also there was an amazing part with loads of accordions <3

Anyone else seen it?