Maybe a negativity schema from a parent who was very tightly wound and anxious. Kids learn this stuff before the age of five. I know that if I have ten positive interactions and one negative then the negative one is going to dictate the narrative I tell myself about the world. If you know what to look for it makes it possible to catch yourself falling into patterns of thought, identify why and learn to see things a bit differently. It doesn’t invalidate anything you’ve been through.