Q&A: Is God perfect?

From what I can interpret from my childhood's knowledge of the Bible, God appears to be an imperfect being.  In Genesis, creates the world in six and rests on the seventh.  Well why couldn't he create in all on one day and why would he have to rest if he was all powerful?  In haven, Lucifer and a third of God's angels rebel against the all mighty and all powerful Creator.  In the Garden of Eden, God creates a Tree of Knowledge and forbids Adam and Eve from eating from it as a test perhaps.  Yet despite his omniscience, he could not foretell this rebellion nor his creation's fallibility when they ate the apple (and if he knew that, why would he get mad?).  Another point I want to make, Why would a perfect God commit mass genocide by killing his people for not living up to his expectations? And why would he feel regret about it?  Can't an all powerful and all-loving God find another way to solve his problems?  It's another blatant contradiction how everyone is God's children yet he basically gives the Jews the right away to kill anyone in their way of their conquest of Israel in the Book of Joshua. Another point is why does evil exist if God is omnibenevolent, omnipotent and omnipresent?  Either God is imperfect or he doesn't care that much to intervene.