The fact that he was staying at her place long enough to make her relieved he was moving back out at all is, in and of itself, an indicator of what a failure he is.
Since BND, his web-shooters constantly fail, he routinely gets beaten by guys he used to mop up the floor with, he displays absolutely no scientific aptitude or forethought, he's more socially inept and insensitive now than he was when Steve Ditko was drawing him, he can't piece together even the simplest of clues, and he pretty much ruins the lives of everyone around him.
BND Peter is like what Spider-Man would be if J. Jonah Jameson was right about him.