I once felt similarly to how you say you feel. Then someone pointed me to a story called The Starfish Thrower. I'll paraphrase it, but you can find it with your favorite search engine.
An older gent takes a walk along the beach. He sees lots of starfish that were thrown onto the shore by a storm and many of them appear to be dying. Off in the distance, he sees a small boy throwing starfish back into the ocean. His curiosity piqued, he goes over to the boy and asks what he's doing.
"I'm throwing the starfish back into the sea where they belong and can live."
The man points to all the starfish along the beach and says, "All your effort... It'll hardly make a difference before they're all dead."
The boy picks up another starfish and throws it out to sea. He looks up at the man and says, "It made a difference to that one."
***
I also recommend that if you are on Facebook you look up GMB Akash, a photojournalist, I believe out of Pakistan. He posts stories of people's miseries - really terrible stuff. But he also posts stories of some of them rising above their circumstances. And Akash is, himself, like the boy in The Starfish Thrower.
In Yiddish, the boy would be called a mensch. In Buddhism, a Bodhisattva.
There are worse things to be...
For whatever my opinion is worth, I do wish you peace and solace.
~ Bal