How does the allusion to David Copperfield characterize the narrator?

The character David Copperfield had a tremendously difficult chidlhood.... Holden is comparing the problems in his life with the young novel character's..... a sad, sad story.

If you really want to hear about it, the first thing you'll probably want to know is where I was born, an what my lousy childhood was like, and how my parents were occupied and all before they had me, and all that David Copperfield kind of crap, but I don't feel like going into it, if you want to know the truth.