From what I understand, the Ottomans enjoyed heavy numerical superiority throughout the war. Why weren't they able to take the Suez and allow the momentum to carry them through North Africa? Were there any opportunities they could have taken that would allow them to come out on top?
There is an excellent book called A Peace to End all Peace.
It gives a great view of WWI with all the actors in the Middle East from the perspective of a bunch of different people like Winston Churchill, Lawrence of Arabia, and Ataturk. It is also really easy and entertaining to read (I read it at the pool).
Another great book to read about this is Ataturk's biography. It was commissioned by him while in power so a lot is skewed to favour him, but a lot of what he says about the failings of the Ottoman military are objective.
In short the Ottoman military, while having been reorganised recently before the war, was still heavily geared towards 19th century wars. Additionally the empire was breaking apart before the war started, so they were not able to fully mobilise all of their people and resources, and had to deal with internal rebellions as well.