I unintentionally created one when I was depressed. I used a sort of imaginary person to bounce ideas off when I was writing or doing anything creative, just a kind of mirror me who I spoke to and then who responded (not literally, it was just me responding “as” them, not a hallucination). When I got very depressed though, I lost control somehow, the self-hating part of my brain took over, and they became a voice very much like what’s shown in this meme.

I dealt with that, eventually. Now I just have my own voice in my head. I’m still not nice to myself all the time, and I wouldn’t say I have total control over that… But it’s a step in the right direction.