It's easy, remember in the immortal words of Martin Riggs, I do not give a f***.
You can't control anything, but, you. You control nothing, but, your attitude and your effort and your daily choices. Concentrate on that, block all the world out. Simple and stress free.
You can't change anything or anyone, but, you do control you and your choices and how and where you direct your energy and efforts both mental and emotional. Screw everyone, get what you need that makes you comfortable and secure and know need versus want, and live in your bubble and void of all things external.
Yes, the world is crappy, always been that way. But, there is and are good things and great things so find those and concentrate on them and find your bliss McGill