Sorry, Arkham Horror has an optimal strategy. If you don´t find it, you are not paying attention. Surely that could be because you don´t care, not only because you are dense.
But if you just play, without thinking, then it´s not quality gaming.
It´s just killing time, and not wirth the label sophistication.
The first part is in no way offensive. It´s truth. I HAVE TO play Settler or Liggretto or Caracassonne at family gatherings and children´s birthdays.
If I meet with my gaming buddies, I will not waste my time for such trivial shit. Because we play RPGS or Wargames that are way more sophisticated and specialized. That´s just TRUTH nothing offensive going on.
EDIT: If you can play Empires in Arms or Battletech with your grandma and little cousin, more power to you. But they are unsophisticated gamers in my book.