Is it possible to fix scarcity of resources?
When setting up your game, there is an Advanced Setup button that you can press - this allows you to change a large number of more in-depth game settings, including the saturation of Luxury and Strategic Resources.
The default option is "Standard", with options including "Sparse" (less than Standard), "Abundant" (more than Standard), "Legendary Start" (biased towards fantastic starting positions at the spawn points for all Civs), and "Strategic Balance" (biased towards a fair balance of Strategic resources).