First you say
Who says god created the universe for mankind? I don't think so, there's almost no evidence other than earth.
Then you say
Why couldn't god have decided to create a universe with laws of physics? why couldn't he have started with a single cell animal and developed it eventually into dinosaurs and then mammals and then humans? ....Try looking in terms of creating something that works, a world, universe etc that works and being able to put creature in this universe that can live strive and better itself, that can deal with adversity, triumph and failure, can love and hate etc...
So which is it?
You say you think that the "design" of the human body is intelligent. There are many, many reasons proposed by biologists for why they believe that the human body was not "intelligently designed." Here are a few off the top of my head:
1. The human eye is actually backwards, with optical nerves going outwards then heading towards the brain.
2. A very big chunk of our DNA is useless, "junk DNA," a relic of our evolutionary past.
3. An intelligent designer would have removed our tail bones and appendices, also relics of our evolutionary past.
4. Our bodies were "designed" to walk on all fours for many millions of years. It is only in the past few million years that we have begun to stand upright. That explains why hernias, back injuries, knee and hip injuries are so common among humans. These organs were not "designed" for walking upright.
5. Whoever designed us cannot be called intelligent. The idiot intersects our respiratory tract with our digestive tract, so that we choke on things we swallow. Children, especially, are highly likely to die because of this. Also, this unintelligent designer put toxic sewage lines in our recreational areas!
The only designer of the human body is evolution, a blind designer. That does not make me "spiritually dead," as you allege. It only makes me a person who makes up his mind after carefully looking at the evidence. In fact, I am very much spiritually alive.
Finally, I should remind you that evolution is a PROBABILISTIC process, in the sense that if you think of the evolution of life on earth as a cassette tape, and you hit the rewind button into the distant past, then hit play again, things might play out very differently.
For example, if the first vertebrates, that lived in the ocean about 450 million years ago, had gone extinct, then all vertebrates today, including all of us mammals ,all reptiles, etc, would not be around today.