I'm not sure why the hatred for this series. It leaves a little to be desired concerning backstory, but I think you get enough of it for satisfaction. The show incorporates not only, the Soldier sentiment from the front lines, but also shows what families experience on the home front--that everyone is in this fight together. It also deals with the intricacies of loyalties among those who are native-Iraqis, the struggle in deciding who to side with, and the moral issues the American troops run into, while trying to make it out alive. It also shows the human, family, and team elements common among Soldiers in wartime.
So far I have enjoyed the show. It is full of action and pretty intense gunfights, battles, comms issues (the real, military deal), the whole nine yards.
I've enjoyed the series for its entertainment value, but also for some of the realism and different aspects of what it takes for our troops on the front lines and their families as they take the long road home.