[_underfl0w_]

You seem to be underestimating the vastness of time throughout the entirety of the universe's existence. There's been far more time in the existence of the universe during which these things didn't happen than the time it took them to happen. If this all measurably happened immediately after the universe's inception, sure, intelligent design seems more likely. But that's simply not the case - the opposite of this all happening is it simply not happening, which was already the case at one point and occupied immensely more time and space before now than that of "existence" as you and I know it.