99.9% of times this end users fault(/3rd party app that modifies repositiories), he has enabled developer mode and ****ed up the repositories, and/or installed something from custom repoes that messes up depencies.

Competing platforms don't have that many source.list problems because system is locked. If N9 wouldn't have developer-mode and noway to edit repoes, then most of the problems would go away too, but ofcourse you can proof me wrong:
@shinogami: so you have not enabled developer-mode at all, and have not installed any app outside the store?