Why do bad things happen to the innocent?

OK, so to start, I searched this topic on the exchange and found no answers that were satisfying. I am not questioning God, I just have a hard time coming to terms with why bad things happen to the innocent. For instance, a mother through no fault of her own can't afford to feed her babies and has no means to do so except strip or other unsavory actions. Or, a young person who by all observable means did nothing to deserve developing an addiction to heroin. Even with charity, and the good things Christians do, people will inevitably fall through the cracks. How is this fair? I know that God given free will plays a part, but if God saw the way these people, for better or for worse grew up, how can he still put them through unspeakable hardship, when they did nothing to deserve it? I feel this question doesn't need references to prove what I am saying, all you have to do is look at the state of the world. These things happen on a daily basis. I ask because, I feel bad for these people and it is causing my faith to falter. I apologize if this doesn't meet the standards of the community, I did my best to adhere to them.