The answer to 'my mulch looks bad' is that there are several common causes, including age, decomposition, and improper installation. Symptoms may include fading color, thinning coverage, or the mulch becoming compacted and matted.
To fix mulch that looks bad, you can try refreshing it by adding a new 2-3 inch layer on top of the old mulch. This will restore the color and coverage. However, if the mulch is very decomposed or there are other underlying issues like poor drainage, you may need to remove and replace the entire mulch bed. For larger areas or complex problems, it's best to call a professional landscaper for an assessment and recommendations.