What's with this God?

I think this often -

We pray to God for more wealth, success in studies and business, but does God even understand these things? These things are part of the artificial web woven by human beings. We ourselves created this system and then are running madly to win in it. God only created nature. Human bodies are part of it. May be he can ease our physical pain out of some disease or old age. But does he understand money? Was he involved in creating our bad luck which led to some big loss in business? I mean the luck that he created may have given me fever sometimes but did that luck involve me losing an entrance exam?

And who created God? What is the origin of the ultimate?