I would recommend trying to get a different job. I had stressful jobs in the university setting until I let go of that as an ambition and now have a peaceful job that is a good match for my personality, although my earnings are less without much upward mobility.
Many jobs have cruddy people, and many locations are full of politics, but not every place. It is worth making changes using as much intelligence and information possible until you find the right fit. Otherwise, environments can erode a person psychologically and physically.