The problem with Starbucks is how dark they roast their beans.
Try some beans roasted by a smaller local shop. If they know what they are doing, and you use the beans befor they go stale, you will be blown away by the cup of coffee you get.
There is no problem with Starbucks beans. Coffee is a matter of personal taste. Not all their beans are dark roasted. Their is a wide variety to choose from, depending on your taste. Ask passive Hank, he is an expert on coffee beans, the forum's Juan Valdez.