I've been there. *Hug*

I look at it as a "zooming effect." The more you zoom out and focus on things beyond your scope of influence, the more helpless and hopeless you feel.

What helps me is to zoom back in. Your life matters to someone. Your actions have meaning in this present moment. You have an effect on things just by being here (I can prove this using Physics actually).

It's not our job to fix the world. It's not our job to think about things beyond our own lifetime. It's our job to create meaning and purpose in our lives so that we know that our lives matter in this moment.

I think of this like a giant computer game. You're the hero of this game and it's your job to go on your quest so that you can keep leveling up.