I feel that people are told/made to feel that way too often. It’s time to end this.

You are enough. You are so much more than enough.
Be proud of who you are and what you’ve achieved so far. Maybe you haven’t quite reached your goal yet, but that’s okay, you have your whole life ahead of you. You will reach those goals because you are incredible.

You should be proud of who you are. I know that you’ve probably gone through a lot and you’ve been so strong. You’ve made it through everything you’ve come across so far and you will continue to conquer anything in your way.
Just always try your best because that is so much more than enough.