GMIA,
If you are on your first couple of tours....you don't have the time in country yet to accurately appreciate the situation. It takes a while before the empty promises pile up and the "horror" visits itself upon you. After a few of those events occur.....let us know how you are getting along then.
Your positive attitude will help out but over time it will need some reviving. Key issue...how long you expect to be in Nigeria? The rest of your flying career? That prospect alone should ruin your morale instantly. The company does have a rotation plan so you only spend a few years in "bad" locations, right? Then they rotate you to a "good" place?