That's kind of what happened to the last girl who played Durant in my city XD But she dropped, 0-2. It's a luck based deck, but you still did pretty well. At least you actually got CP instead of getting luck sacked into fifth. At least you made top cut with a tier two deck and lost to mirror, even more luck based. AT LEAST YOU DIDN'T MISS CUT TO A BAD DECK BECAUSE OF SKILL ALONE. I should give you my list for HS-ND but I'm giving it to everyone in my SPT/Regionals article. It's standard, but it's really good. Especially, like I'll mention in the article, because Reshiram is being outclassed by Mewtwo.
All in all, you shouldn't feel bad. You're doing better than I have with a worse deck. With the CP you have already, you might be top 40 in the US, and not 99th or something like I am.
Like I said to myself before--Next time it won't be a bust. I'm testing HS-ND already so that I have actual testing to back me up in my article, which will help you and a lot others.
Btw, do you run Defender in your Durant?