While "stop being a victim" seems pretty dismissively sarcastic to me, if you reverse the meaning it can actually be useful advice in some work situations: if you are a victim, change the situation or leave.
I guess what I meant is that there are true victims who are being harassed or abused, and telling that group of people to change their mentality and perspective (without changing their circumstances) would be dismissive.
I mean more in the workplace, where it's possible to think of yourself as a victim, a sort of ... variation on self-pity. When I have seen this, it ... didn't help.
