How do I stop treating myself like I’m worthless?

Answer 1

If you are a Christian you can remind yourself that you didn't make you, God did. You were made in His image, so if you put yourself down, you are putting God and His workmanship down. I know that you have free will to choose things God wouldn't, but He hasn't given up on you, so who are you to decide you are hopeless or worthless, when God sees otherwise?

Answer 2

https://www.jw.org/en/publications/magaz...
I have a link to an article that has helpful suggestions on how you can boost confidence in yourself