You're not the problem, they are. Most people ( but not all) cannot see further than the end of their nose - i.e. past the superficial, cosmetic aspects of a house. Fortunately, as I said, this problem is confined to the majority - don't despair - don't give up hope - 4 weeks is a very short time - last house I sold took 14 months. Eventually, you'll find a buyer who can see beyond broken fences, etc - in the mean time, make sure that when people come to view the house is absolutely immaculate - as clean. tidy and uncluttered as you can manage.