Your first mistake is assuming that you will ever be able to understand the story of Genesis. It wasn't written for you. You are completely removed from the both the authors and the audience. Nobody that reads the bible today in English can ever grasp the nuance, the intent, the mounds of information that lay implicit between the lines. Unless you have the time and patience to exhaustively study every aspect of the the people who authored those books over a 1000 years then of course it is going to seem stupid.
Well then god is also a moron then. If you inspire a book that is suppose to be the basis for which humans will attempt to "come" to you. Then shouldn't it be easy to understand and something that every society can easily comprehend? It seems that a god would have the ability to craft such a thing, but according to you, the bible is no longer understandable without extensive research. So how is the bible even practical then, in your view? It wouldn't be and that would make it completely worthless then. However; I would take a different approach, I feel your view is just an apologetic response to a bible that is completely and utterly flawed from cover to cover. It is outdated knowledge and only the knowledge of man, not a god. The only point I agree with you on, is that the bible is worthless.
It is just silly to imagine that when we read Genesis we take away the same ideas as the intended audience did.
Why not abandon it then? If we are not getting the message for the reason behind it, then why have it? I think this is another apologetic approach to try and save a dying religion. I also think that the target audience actually knows better that the bible is actually the flaw not the peoples understanding.
The second mistake is to read one book at a time. They have to be read all together so you get the whole story. Heck if I had only ever seen the Phantom Menace I would post on all sorts of forums about how ridiculous and asinine Star Wars is. Now, clearly that is the antithesis of the truth. Star wars as a whole is the greatest story of the 2st century which every living person knows to be true and without question.
Yeah, many of the books get the information wrong according to each other. Numbers will be different, names will be different, places will be different and even the events themselves will be different. There is actually two genesis stories in the bible, both give different accounts. Are you suppose to take this as a whole that the creation story is flexible?
As to your question, according to the religions of the book, God created Man to be custodian over the Earth, to tend to it and to increase its beauty. Something Man has clearly failed at.
Don't you mean god failed to create good custodians? If humans were created for that purpose, and you say that humans failed, it would not be because of the humans that failed, it would be the creator failing to make a good match for that purpose.