I'm not quite sure if you are asking about the problem of evil or the amount of natural evil in the world. I will take a stab at them both.
In regards to the problem of evil we have certain considerations. Now when God created us humans he had two choices in regards to free will. He could have given us no free will and with controlled us and made sure that their was no evil in the world.
Now if he had done that we would have serious claims for a unjust God. As it has been mentioned on this site slavery and love do not mix. He would also have the problem that it would invalidate the position of people believing he exist and loves as it would be something forced upon us.
Now if he gave us free will (Which most Christians affirm) than we can come to the knowledge of our free will. This is a way of believing in God that is much more in tune with the notion of a loving God.
No with free will we have the problem that it allows people to do evil (Even though God forbids it). Free will cannot be internally coherent without the option to do evil.
So this idea that the amount evil in the world is inconsistent with a loving God really holds no sway in light of the free will defense.
If you want to read more I can recommend researching Alvin Platinga free will defense. He is probably the biggest name in Christianity writing about these things.
No on the fact of natural evil. I'm not entirely convinced that natural evil exist. Yes we have in the bible various natural event with which God exacts judgment on nations but I do not think that every time their is a earthquake we should be trying to discern whether God is judging us for some wrong doing.
These could be just the natural forces at work with no divine interferences in them.