When you look at the cultures of the day of Ancient Israel, you find all sorts of chaos, wars and factions. In the midst of that, God set up a nation, and gave it rules and commands that brought a level of civilization unknown prior to that.
Now, I already know you have a little list of some of those commands you don't agree with, and your disagreement would be noteworthy were you God. But you're not.
Ironically, in spite of your implication, those "superstitious" people somehow managed to construct a Book that kept a consistent message for millennia as it was being written- always pointing to the promised Savior.
I honestly laugh a little when I see mental "giants" like yourself mock the most brilliant work to ever be seen among mankind. You are lost and blind, and have no idea this is so. God speaks a LOT about arrogance like yours- it will not turn out well, mental giant.