I'm writing an article about the family and how it can change a person's life in the future. 

I need a word that tells the readers about a family in which the parents have not been good enough to teach their kids social skills and generally those things they will need in the future to be able to live well. 


The word must be formal (and polite).


I searched the dictionary for some words, but I'm not sure if they are the right words to be used with family. I found the following:


  Inefficiency, incompetence, inadequacy, ineptitude, inefficacy


None of the dictionaries I checked (Longman and Oxford) mention whether or not this is the right word to be used with family. Ineptitude of family?


Question: Firefox 4 Downgrades to Firefox 3.6 on Windows 7
Answer: When I went to look at uninstalling I noticed that I had Firefox 3 Beta 5 still installed.  I have uninstalled it, and expect it will solve my problems.