I can see why a crew down situation can make things difficult but it is the same everywhere.
For example, a shift of engineers. 2 on leave, 1 on a course, 1 sick. Do they delay the aircraft for us, No. We all just pull out the stops and work harder than usual. If the plane doesn't fly then we don't have jobs which is a whole lot worse than working hard.
Both me and the people I work with really know what it feels like to finish a shift completely and utterly exhausted but that's life. The legal requirements for manpower have been met, the aircraft are flying and safe, the passengers happy and we have a job. Just go to bed and hope tomorrow is easier.
It is funny because engineers have a reputation for being able to find fault with anything and complain about everything but when it really comes down to it they just seem to pull together and get on with it with the minimum fuss.
I am not saying you are wrong to complain but just don't think it is any different anywhere else.