"Victim complex is a psychological disorder manifesting in both individuals and groups. Once upon a time, traditionally downtrodden ethnic minority groups, suffering genuine persecution, had some cause to complain about the shitty state of affairs that said group was going through. In modern times, of course, what with all the democratic freedoms we enjoy and the general lack of pogroms and gas chambers, many other oppressed groups have bravely spoken up about the terrifying ordeals they nobly endured, up to and including 'being looked at funny', 'being called nasty names', 'having their deviantART/LJ trolled'.
In short, every idiotic group and individual with a slight is nursing a complex about it. The truly desperate cultivate multiple complexes into an entire bundle wrapped up into deep seated psychosis.
The possessor of a victim complex needs some outside authority to blame for their own failures. They can never compensate for their personal challenges in order to do the basic competition necessary to be even minimally successful at life. Those with the most institutional of complexes have created not only an outside persecutor but feel an innate and deep endowment for entitlement, even privilege. In many cases those with a victim complex have foisted their delusions of persecution onto others and convinced the supposed persecutor into another complex: liberal guilt. Those who are members of the class of people (supposedly) persecuting the victim who don't subscribe to liberal guilt are held up as examples of those who really ARE persecuting them which just reinforces the complex."
- Stolen from http://encyclopediadramatica.com/Victim_complex
