Self-victimization or Playing the victim are both common expressions.
From Wikkipedia:
Victim playing (also known as playing the victim, victim card or self-victimization) is the fabrication of victimhood for a variety of reasons such as to justify abuse of others, to manipulate others, a coping strategy or attention seeking.
https://en.wikipedia.org/wiki/Victim_playing
Denial is also a defense mechanism commonly used by those with substance abuse problems and sounds related to your question.
From Psychcentral.com article: Denial: The Primary Roadbloack to Addiction Recovery on the symptoms of denial
They view themselves as a victim. Addicts may think they face more stress than everyone else or that life is out to get them, therefore, they wouldn’t be able to cope without drugs or alcohol.
Or perhaps he is just being Manipulative. From Dictionary.com:
Manipulative - adjective
- Influencing or attempting to influence the behavior or emotions of others for one’s own purposes: