While some people are naturally strong in CR, one can certainly improve in that area with a solid guidebook and proper question practice. The Powerscore CR
Bible, for instance, is a good option.
The main danger that I sense in your approach to CR is that it opens the door for you to adopt a passive attitude toward that section. Not only can that prevent one from improving, but this outlook can spread to other areas of the test. In other words, being passive is hard to contain to just one topic; it's infectious. Always assume that you can do better on every part of the GMAT. Otherwise, you might be sacrificing points.