Yes, there is a great deal of suffering in this world. Isn't most of it, however, caused by an abuse of human freedom? Every day newspapers carry stories about human freedom used destructively.
God could prevent such tragedies by temporarily and selectively suspending human freedom to prevent its abuse. That would suggest that people never have to accept the consequences of their destructive decisions yet are free to claim responsibility for decisions with positive outcomes.
If God totally abolished human freedom, that would eliminate the positive uses of such freedom. Doesn't love require human freedom? Isn't our freedom part of being made in God's image and likeness? (See Genesis 1:27.)
Because I believe in a life beyond this one and because I believe that God is both good and just, then the abuse of human freedom cannot have the last word. God's values must prevail eventually.
Although I cannot control how other people use their freedom, I can and must decide how I will use mine. No one can do everything, but everyone can do something.