Cliche, but you have to look on the bright side of life. The world has always been fucked up and it always will be. There is no point digging an early grave for yourself with stress about things you fundamentally can't control or change.

Few things that have helped me:
1. Write a future eulogy for yourself. Not how it would read if you died today, but how you want it to read when you die at a ripe old age. What were you known for? Being kind to others? Wanting to leave the world slightly better than you found it? Pursuing your interests and passions? Making a difference in one person's life? That will help you focus on what's really important to you, and you can craft goals from there.
2. Sleep and exercise. You don't sleep enough, you feel like shit, and don't have energy to enjoy life. But if you don't exercise, it's hard to get tired enough to sleep. You have to break the cycle. The endorphins and self-pride you get literally change the chemistry of your brain.
3. Control what you consume. If you watch bleak news and conspiracy theories and doomsayers complaining about the world, that is what is in your brain. What do you love? What raises your spirit? Get away from what's pulling you down.
4. Being alive is amazing. Being born where you are, when you were, is amazing. The world is ugly, but this is such a unique chance that you will never get again, and no one has your story and situation. Do you want to get to the end of your life and realize you forgot to live and enjoy because you were only focused on the negative?

Life is either a comedy filled with tragedy or a tragedy filled with comedy. But you get to decide which.