Often, in interviews, people say ‘I’m my own worst critic’.
They say that in employee reviews too.
That’s because they actually are bad at it.
If the self-talk says “self, you’re awful”, then yes indeed, you are your own worst critic. Is your course of action ‘stop being awful?’ Did it work? Did you stop being awful?
Of course, we all do it to ourselves anyways. Just some more than others.
Here’s a parallel thought.
Does being your own worst critic give you a pass, so you don’t have to challenge yourself or the status quo?
Does it make you refute or ignore feedback from others? “I’m already my own worst critic. I don’t need to hear this.”