At what point does a complex become pathological? I've a first question so I apologize if the format is completely awry.

I'm reading Meeting the Shadow: The Hidden Power of the Dark Side of Human Nature and I came across this passage by Edward C. Whitmont:


  The shadow cannot be eliminated. It is the ever present dark brother or sister. Whenever we fail to see where it stands, there is likely to be trouble afoot. For then it is certain to be standing behind us. The adequate question therefore never is: Have I a shadow problem? Have I a negative side? But rather: Where does it happen to be right now? When we cannot see it, it is time to beware! And it is helpful to remember Jung's formulation that a complex is not pathological per se. It becomes pathological only when we assume that we do not have it; because then it has us.


The bold is my own addition to emphasize where my question stems from. This is the whole paragraph to the end of the chapter so as much context as I could give on it. To me (psychology as an interest/hobby with no classes or experience) this means that when we ignore the effects a complex has on us then it becomes pathological. 

An example: Say I have an amputated hand and am lividly jealous at the sight of people doing things two-handed. By refusing to acknowledge and deal with this dilemma, I am relegating it to others to deal with by default and it thusly becomes pathological.

Is this accurate? Are there other important factors to take into consideration when considering a complex pathological?
I don't think there is an easy answer to this question. It is a bit like asking how long is a piece of string. Really what you are asking is, what is the defining point between a lesser problem and a greater problem, that it can be diagnosed as a pathological. 

My answer would be once a complex impacts on an individual's ability to function normally, becomes a more persistent within the person's thoughts or in any way crippling then it is pathological. Or better put in the following quote:  


  psychoneurosis, also called neurosis, plural psychoneuroses, or
  neuroses ,  mental disorder that causes a sense of distress and
  deficit in functioning.


Firstly to define what Jung considered to be a complex.


  Jung's theory of complexes with key citations.
  A "complex" meaning a personal unconscious, core pattern of emotions,
  memories, perceptions, and wishes organized around a common theme
  (Shultz and Shultz, 2009). .../...
  
  Jung often used the term "complex" to describe a usually unconscious,
  repressed, yet highly influential symbolic material that is
  incompatible with the consciousness (Daniels, 2010).  .../... 
  
  Some complexes usurp power from the ego and can cause constant
  psychological disturbances and symptoms of neurosis (Daniels, 2010)


So given that  when a complex becomes a greater problem, it's a  neurosis. We need to define neurosis.  


  Neurosis is a class of functional mental disorders involving
  distress but neither delusions nor hallucinations, whereby behavior is
  not outside socially acceptable norms.1 It is also known as
  psychoneurosis or neurotic disorder, and thus those suffering from it
  are said to be neurotic. The term essentially describes an "invisible
  injury" and the resulting condition.


Now we compare this with the definition of what pathology is in psychology.  


  Psychological Pathology   Definition   The scientific study of
  psychological disorders and their causes.   Description
  Psychological pathology is the study of the causes, components,
  course, and consequences of psychological disorders. These are
  characterized by abnormality and dysfunction.   Abnormality
  Psychological disorders are defined by diagnostic criteria, like those
  outlined in the Diagnostic and Statistical Manual of Mental Disorders
  (DSM; American Psychiatric Association [APA], 2000) or the
  International Statistical Classification of Diseases and Related
  Health Conditions (ICD; World Health Organization, 2007).


The inclusion of neurosis in the DSM has been controversial and neurosis is not considered a part of anxiety conditions.