So, SO bad.

Rating: 1/10 (29 December 2017)

Terrible effects, over 300,000 evacuated but no use of CGI and there was typically around 200 just milling around, almost 1,000 civilian boats took part but the film decided to depict about 20 of them. There were modern building around the beach, the Spitfire effect at the end was just laughable, characters were terrible, didn't tell a story, no scenes really mattered, etc.
Most of all, one of the biggest logistical missions of the war with countless brave civilians stepping up and doing their duty for king and country (and significant loss of life) and we get a terrible action (!?) flick with no real acknowledgement for the heroes. I also believe Christopher Nolan said he didn't want to include Churchill in it as it would make it political. Genius.