Your impression of "hazing" is fair IMO given the majority of the aired footage. In particular I was taken aback by the flying kick from the rear while Doug was occupied by other opponents.
However, if you look carefully at the final test, Doug demonstrates a range of beginner techniques. Obviously he trained techniques and they just didnt show the training. To support this fact, you can search youtube for krav maga fight quest training to find unaired footage of Doug learning defense against weapons attacks, take-down defense, and doing padwork.
Fight Quest had a bias toward showing the guys get beat up in all martial arts, perhaps to differentiate from human weapon, which showed more techniques. Although usually it seemed that Doug got more punishment than technique, for KM it seemed reversed.