Bullish Dartford manager Ady Pennock thinks they need to win all of their final four matches to avoid National League South relegation this season. The Darts returned to the drop zone after a 2-0 Easter Monday home loss to fellow relegation-threatened team Eastbourne Borough made it back-to-back defeats. They went down 4-1 at second-placed Chelmsford last Friday, despite midfielder Brandon Barzey’s second-half strike. Dartford are still winless since Pennock took charge in early March but must turn it around quickly, starting at second-bottom Havant this Saturday, if they are going to have any…