So you don't personally like CC based on your experience of it 2 years ago, so what? You don't have to use it. It just so happens that a lot of people really like their service.
If it outputs bad candidates, as you claim, then you should have no problem beating them in job interviews.
The glut of free programming books and tutorials on the internet along with open source operating systems and development tools and the Stack Overflow and other Stack Exchange websites have collectively done much more programming and CS education than CC has done and likely ever will do.