It has been obvious since the beginning that the recruitment of expats only is a quick fix. The CEO has publicly apologized for having to recruit yobancis and said that he is forced to do so due to demand and inabilty to find locals. Some agencies have made some promises, but if you are able to get the big picture (which is essential for a leader, like a captain) you knew from day one that an upgrade most probably wouldn't be a reality unless miracles happen.
The locals are in Turkish for a long term career while we yobancis use it as a stepping stone to put food on the table and to see our families three days a month, not caring about what is happening in the country as you say.
Therefor I understand that they rather invest in their locals when possible rather than investing in someone who won't be seen once the 1500 hours are in the book, or once the market in their home country picks up.
With the CRM and culture, I do agree but with the newer generation, I feel that there's an overall change taking place towards more modern and sensible attitudes.
My point is that: Even though we might see it as unfair, the rules were very clear before joining and we'll have to vote with our feet or suck it up. As I mentioned, an FO in THY makes five times of what hard working academics do, for this reason whining and moaning won't gain any sympathy.