There you go then, you've answered your own objection to the Abrahamic GOD not being smart enough to create us. Christian and non Christian Scholars confirm the Bible is largely written by unknown sources, and contains:
Words of wisdom and guidance for mankind.
Tribal writings from men to justify the things you mentioned.
Poetry
History, both accurate and inaccurate
Story of Creation as understood and remembered by those who either directly spoke with Prophets and Messengers, or their subsequent followers, decades/centuries later, thus some things are correct, whilst others reflect the fallible human understanding of the time.
The GOD of Abraham pbuh sent one last piece of revelation for mankind. Here's what He said about the previous Scriptures and those entrusted to look after it:
But because of their breach of their covenant, We cursed them, and made their hearts grow hard; they change the words from their (right) places and forget a good part of the message that was sent them, nor wilt thou cease to find them- barring a few - ever bent on (new) deceits: but forgive them, and overlook (their misdeeds): for Allah loveth those who are kind. From those, too, who call themselves Christians, We did take a covenant, but they forgot a good part of the message that was sent them: so we estranged them, with enmity and hatred between the one and the other, to the day of judgment. And soon will Allah show them what it is they have done. Qur'an 5:13-14
The solution is given in the next verse:
O People of the Scripture, there has come to you Our Messenger making clear to you much of what you used to conceal of the Scripture and overlooking much. There has come to you from Allah a light and a clear Book. Qur'an 5:15
Now you have 2 options, either read the book for yourself and decide on whether its source is from beyond the natural World or not.
Or don't read the book, just visit sites with agendas like answeringmuslims.com or wikiislam and copy and paste their arguments against the Qur'an, which have been refuted time and time again or lastly, (yes there's a final unorthodox method!) You could ask you cat to guide you as it knows if something is from GOD or not
Al-Qur'an al-Kareem - القرآن الكريم