I'd finish it. I probably would do a simple quilting and don't worry about how pretty the backing is and I'd put the binding on by machine as to save more time invested. If someone in my family didn't want (which would be rare) then there are many out there that need something to keep them warm. If you don't like it give it away or donate it but don't just let it sit there or toss it. You do have all this time and money invested in it so do something with it.