Maybe you can find a couple small sewing projects (Mug Rug, placemats, bookmarks, etc) just to reset your brain. That's what I do when I just can't find the motivation to work on a particular UFO. Sometimes its just the fact that you finished A PROJECT, ANY project, and can move on to the one that made you stuck.
And just think, if you finished this quilt that you hate looking at, once it's done and given as a gift, you will probably never have to see it again!!!
Teri