The answer to 'my shrub looks bad' is that there can be several common causes, including pests, disease, improper watering, or environmental stress. Symptoms may include wilting, discoloration, or dead/dying branches. Solutions depend on the specific issue, but can include pruning, treating pests/disease, adjusting watering, or relocating the shrub to a better spot.
If the problem persists or you're unsure of the cause, it's best to consult a professional landscaper or horticulturist. They can diagnose the issue and recommend the appropriate treatment. DIY attempts to fix serious shrub problems can sometimes make the situation worse, so calling in an expert is often the wisest choice.