The guy has some decent points, also correctly points out the amount of things working against the series (Covid, etc).
I think the series gets unfairly compared to Band of Brothers and The Pacific simply because it was a Spielberg production, but the show was never meant to be "Band of Brothers but in the air". It has its own unique storyline with different perspectives than the other two mini series.
There were certainly some half-baked aspects to it, but overall I thought it was fairly well done and like fdski said - happy we have it and that it brought some attention to a period of time that is slowly but surely being forgotten.
