It has happened to me – my ex-wife, who had no introspection at all – used to blame me for what were clearly her own flaws. It took me a while to understand that doing so was her ‘escaping’ from unpleasant reality on her part.
I think it’s all about self confidence and knowing yourself. If you are confident on why ‘you’ are the way you are, and more importantly, happy in your own skin, then you are smart enough to not let that sort of projection bother you,