@Representing_Tromba Philippine rules in promotions, especially in public positions, would require me to study masters and doctor's degree. Not only those aren't in my mind, I also got into teaching so I can always face students instead boring adults.
Filipinos have this curse that once they were given a bit of authority, they would abuse it, thinking the world owes something to them, which, unfortunately, extends to the rank and file.
If you are already thinking of resigning, perhaps use the time you have left to stand your ground and just refuse to do anything extra for them. Let them know what walking all over you leads to.