Is God trying to be hidden?

Questions about whether God’s primary object is to not be found, how one can say God doesn’t make mistakes if the percentage of Christians in the world is so low, and whether the fact that not everyone will be in Heaven is proof that God doesn’t win every battle.  

• Would you say God’s primary object is to not be found?
• If God doesn’t make mistakes, how do you explain the fact that Christians have reached an all-time low percentage of the world’s population?
• If the common belief that God wins every battle were true, then no one would be in Hell.