A little self-criticism is a normal shared human mental pattern, and can even be healthy for the most part. But, we can also just as easily open the door to that overly vocal “negative nelly” voice in our head.
However, if your negative voice is preventing you from doing what you want or need to do in your life, then it has to get booted back out the door. This kind of mental chatter has no right to set up shop in your mind.