A character in this series was asked if she was OK. Her reply was "I'm good". In 1942? That grammatically incorrect expression has only become popular (unfortunately) in the last few years. No one would have said that back then. The series is loaded with inane inaccuracies many of which have been pointed out by others here. Clearly the writers don't do much research. A good story premise is being wasted by this series.
Yeah! And at the end of the pilot they played "One Way Or Another" which Debbie Harry & Blondie didn't even write until the 1970's! Ridiculous!
"Inane" is a pretty strong word. As is "clearly" when it comes to the question of research. It's fine that you don't like the show. The IMDB message boards are a fine place where everyone gets to nitpick.
But if you think the majority of people watching the show are kvetching over a medal or deliberately anachronistic language rather than time-accurate but distancing contemporary idiomatic expressions, you are simply dreaming. The target market for the show gets it just fine, and they let us know it. They care about things like, oh, character. Relationships. Stakes. Stuff that rises above the - and here's a loaded word - "pedantic."
Using period dialogue can sound ridiculous. They were strict about that on Bomb Girls and it was often more unintentionally funny than anything else. X Company deals with life or death issues having the character saying "Gosh Darn it " when things go wrong would weaken the stakes and take people out of the moment. Using modern dialogue makes it easier for audiences to connect with the characters. Deadwood used some modern language for the same reasons.
OK so it's not incorrect but it still is out of place. People in 1940s didn't say that phrase. This series is supposed to be set in 1940's Canada and Europe. It is not set in an alternate universe where such anomalies might be tolerated. Having people speak the way they do today and not as they actually did back then decreases the "truth" of the stories and setting. It's that lack of believability or plausibilty that makes this series so hard to stomach and turns it into a cartoon.