I translated a number of comments using Google translate, and it seems many were simply making fun of the incompetence of the pilots (not understanding blackouts, raising landing gear, etc). a few comments on the the dated graphics and lack of good explosions, and challenges to them to fly DCS or other more difficult sims.
They were not serious reviewers giving the game a serious review - more like clowns goofing around for the entertainment value of the resulting video.