Most players with a weak backhand tend to hit a defensive shot, blocking or slicing the ball because they just want to get it back in play. A good player will take advantage and constantly go to your backhand.
You have a choice. You can stay there, take it, keep giving it to them, and hope that they miss… OR you can fight back.
Swing through on your backhand to put yourself in a strong position to play your favorite shot. Pivot and Attack.