Preferential Bidding System
This airline has a Preferential bidding system were flights are allocated based on crew bids differentiated on the basis of seniority / date of joining the airline.
This has the effect that popular flights go to the airlines seasoned and experienced crews and unpopular flights get given to the new hires.
So if its a deep night flight, with a long duty period into a place with limited alternates with poor weather and over the weekend which in Dubai is Friday Saturday then chances are both the Captain and first Officer will be new (ish) to the company.
PBS can result in inexperienced Captains and First Officers either new to the company new to the type or new to Command being crewed together for sectors that those with more experience choose not to do if they can be avoided.
Deep night Russia in winter at the weekend how many old hands bid for that?