I'm a hopeless agnostic?

Here's the thing: I'm 14 and I've been reading the bible for a while according to a schedule. I used to be in to it but I think as I've started to mature I've realized that the whole bible is basically just the same things over and over again: don't do this, dont do that, do do this, do do that.. I don't understand why God wouldn't just make a perfect universe for us to live in. Is he just having fun? Is our suffering his amusement? For instance, 2+2 definitely equals 4. But if God were the god he's so cracked up to be couldnt he just change that to 2+2 = 5? Or 67? Or 23467? To us it doesn't make sense but God should be able to make it make sense, and he should be able to make us incapable of sin, or better yet what many everyday things considered sin not sin? How is this world, a world torn apart by war, hunger and poverty, God's world? Why is so much of societies morales based on something we cannot prove and simply decide to believe in? I think I believe in God.... But the God I picture is far too intellectual to feel and appear so human as he does in churches and the bible. Why would God create sin? Why would God create us so that we can die? Or that we need water and sun and air? Any thoughts?