What the creator established is called ... creation --- what's so hard about that ?
What something is called is not nearly as relevant as what that something really is. It is obviously hard for the human mind to comprehend things beyond superficial appearances (i.e. a perceived flat world and earth centered universe).
Did the creator establish evil, death, disease, sin, etc. Was this done by an all-powerful, all-knowing, all-present, perfect and good supreme being? If so, one of two things must not be true, He must not be all good or He must not be all powerful. Evil appears to be just as powerful as good (plus or minus a little) - and who created evil anyway? If man can exercise free will to choose between two powers, good (God) or evil (the devil) then there are two gods, two forces in the universe, not one as the Bible says. Does that make sense to you? Is it really that simple?