How can I repair this sagging gate door without replacing it completely?
I would purchase a kit that has a steel wire and turnbuckle setup attach to the hinge side top left and the bottom right, some of the kits have turnbuckle the wire rope clamps and brackets to screw into the frame work for under 20$. These kits will allow you to tension the gate and remove the sag. You will need to adjust the latch but without the sag the gate would swing normally. Link not working right but Google ace gate anti sag kit 13.99$