Is my peach tree salvageable?

Got this sickly looking peach tree in the end of May. After about a month I started seeing red/black spots on the leaves and it looked like something what eating them. Did some research and started spraying it with neem oil. The spots stopped happening on newer hight leaves, as well as the bite marks. Now all the leaves are falling off and it looks like this. Is it dead? Does it have any hope? What can I do to put it on life support and make it through the winter?