You know, they say you haven't failed until you've quit trying. That seems incredibly applicable here.
Quit kicking yourself. If you did the best you could at the time, then you can be sad that it didn't go better, but you can't be so mean to the younger you. She was in a bad situation, and she tried hard.
Try this exercise:
Re-read your story and pretend that a friend of yours wrote it. What advice would you give her? (I'm betting it sounds very much like what all of us are saying to you, right?)
Now take your own advice.
Mostly, forgive yourself. Tomorrow is another day.
