As wise council once said to me .... "only fight the battles you can win" . No matter where you are in the World you will not change the system that has led to your deep despair. To varying degrees our good nature and professionalism are taken advantage of as commercial pilots, by people who neither understand the role and who do not live/work to the same standards.
I freely admit I am a "one trick pony" (maybe 2 with helicopters), as this is what I am trained to do. I try ( with varying degrees of success, due to my less than "easy" nature sometimes) to ..
1. Ignore/ laugh off things that make you angry/ frustrated at work ..
2. Always, always do your job to the very best of your ability (including commercially) for your own esteem and self respect.
3. Concentrate on pleasures and rewards outside the cockpit, and do not dwell on work issues. There will still be an aircraft fueled, catered and serviceable ready for your attention when you next check in .....
Good Luck ....
I.Duke