I don't understand the rave reviews

Rating: 4/10 (2 August 2017)

My Uncle Frank died on Dunkirk beach.
I was hoping to see a film that portrayed the horror of war - as means to deter others. What I saw was over-hyped, uncritical nonsense.
From what I know from relatives, the evacuation was utter carnage. Yes soldiers escaped - but many (at least as many as escaped) were mown down via aerial attacks. The film showed very few aircraft which was stupid (also not very many soldiers). Very few ships and aeroplanes now survive but I'd have thought the CGI budget would have covered that.The lack of planes, boats and people seemed very very strange.
Where were the Germans? We saw two German helmets when a pilot was captured. That was it! Did the film have German financial backing or something?
Also for a reportedly costly film - the shots were full of modern artefacts.
Garbage. Hype.
Do yourself a favour and watch something else.