As regards making sense of existence, there are other religions which could make an equal claim.
Other religions, and those who support EVOLUTIONDIDIT, are man made attempts at making sense of our existence. Christianity is all about God showing us the reason for our existence
Muslims would make a pretty similar claim.
I would note that gods don't write books, and whatever your holy text is, it was written by people, sometimes inspired, sometimes not so much, but always human. All religions, without exception, are products of human mind and culture.