If you have been victimised then you are a victim. But I agree there is a difference between being victimised and having a victim mentality. The latter is part of a much bigger problem. And cracking out the victim mentality when YOU have wronged people will never get my sympathy. "I can't help it, I have x,y or z condition". That may well be true but that's not an excuse. You either understand the difference between right and wrong or you should be in an institution for your sake and others.
When one has a victim mentality, they are ultimately giving up their power. They believe that the world is against them, people in their life want to hurt them, or that bad things purposefully always happen to them. They blame others for the bad circumstances that they find themselves in instead of
We’ve all met the person who plays the victim, they love to waffle on about their woes and how they’ve been mistreated by the world. Victims never accept responsibility for their own actions, even when they were the person who started the drama and continued to stir the pot.