KTC, I don't think you can actually "bury" stuff you feel good about. Put it aside, sure, but leave it somewhere you can get at later.
Ten years ago I began a novel which got relegated to the back of a drawer because it was messed up for various reasons. Since then, I took it out a couple of times and tried to re-work it, but with no success. BUT, this book wouldn't let me rest, and a few months ago I went back to it and completed it. Guess what, ten years after I began this book, it got me a London agent. Whether or not he ever gets us a publishing deal remains to be seen, but I did finish it!
As debs said: " No, no, no. Please don't give up. Put them away and take a break. Who cares how long for, years even." As others have said, put it aside for now. This is not a case of giving up, it's a case of knowing when to step back, leave it on the back-burner and move on to other things.
Triceretops, I know that feeling. I've recently written a novel that scared me. It was heavier than anything I've attempted before and at times I felt way out of my depth. Right or wrong, I had to finish it.
So, I think all the posters here have answered the question: "What are you giving up on? And why?"
We don't give up, do we guys? We - including you, KTC, believe in ourselves.