The answer to 'why is my drainage system drainage problems' is that there are several common causes for drainage issues, including clogged drains, improper grading, and damaged pipes. Symptoms may include standing water, basement flooding, or water pooling in your yard.
Some solutions include clearing debris from drains, adjusting the slope of your yard to improve water flow, and repairing or replacing damaged drainage pipes. If the issue is severe or you're unsure of the cause, it's best to call in a professional landscaping or drainage expert to diagnose and fix the problem.