When creating an OC, always remember that they are already perfect just as they are. Never plan any kind of development or character arc! All problems in your character's life should be other people's fault, and any character flaws they have should only be viewed as an issue or annoyance by antagonists and bullies, while all nice characters should see them as endearing quirks, even if they're flaws like "steals things from everyone" or "commits random acts of violence" or "never helps anyone with anything". Your OC is a precious, pure soul just trying to get through life while bad people cause them trouble.