they often accidentally “protect” you from succeeding, too.
sometimes it helps to identify what the gremlins are saying. just noticing that this is gremlins can be helpful. sometimes it is helpful to have a conversation with the gremlins. there is probably also a version of you who knows you can do whatever it is that the gremlin is worried about. having that version of you reassure the gremlin can also help.
you do not have to convince the gremlins that it’s okay. sometimes you just need to acknowledge that they are there, thank them for their concern, and politely ask them to leave you alone while you get on with doing whatever 