It seems so many people didn't get the cues that the movie is a 1950's pulp story in the same way the original trilogy is a 30's adventure serial. Everything from the dialog, direction, VFX, simulated 50s color filmstock, lighting - EVERYTHING! In fact, I honestly found the look a bit disconcerting because it looked so much like a 50s film that had been dug up and digitally cleaned up to get rid of some of the rot and grain.
The plot of the film was perfect for what it was doing and was full of the inventiveness of the entire franchise and rich details. It was a quality Indy film from A to Z.
It is perhaps proof that you can never satisfy fans who hold something sacred like Indy. No matter what you do it will seem "wrong" to them because it is different from what they remember experiencing the first time they saw the original.