If God did create the world, then why is it imperfect?
The world exists in a state of imperfection as the result of sin. Not only does the Bible clearly teach that man is imperfect; but every scientist, anthropologist, historian, psychologist, psychiatrist and physician knows very well that man is imperfect. It stands to reason that if we were perfect, then those above professions, whose occupation it is to “fix” man's imperfection, would be jobless.
Sin is the cause of man's imperfection, and the only lasting remedy is found in forgiveness through the substitutionary sacrifice of Jesus Christ.