We all make mistakes, it you really did something wrong, say sorry, take responsibilty and move forward knowing you may make more mistakes (thats what humans do)

The person you have been (maybe there are reasons? Or Not?) is not who you have to be. Don't be too hard on yourself as I too am a little ashamed when I have a meltdown. Any human would have a meltdown if they too had had trauma that overwhelmed them.

So YES, YES and YES you are worthy. Placed into the universe by a series of chance meeting of every human and lifeform that went before you. Just what were the chances that you and the rest of us were even born.