The answer to 'my hedge looks bad' is that there are several common causes, including overgrowth, pests, disease, or improper trimming. Symptoms may include discolored, thinning, or irregular foliage. To fix a problematic hedge, you'll need to identify the underlying issue and take appropriate action.
For minor issues like overgrowth, you can often trim and shape the hedge yourself. But for more serious problems like pest infestations or diseases, it's best to consult a professional landscaper. They can diagnose the problem and recommend the right treatment to restore your hedge's health and appearance.