Hi there johnny ! I know that it is very disappointing when we don't get the mark that we aimed for, particularly if we put in our best efforts. I got a 64% on my creative piece this year, and I was also very disappointed. My school is very competitive, and I felt like I was getting nowhere since all of my friends got really good marks and I was the only one who didn't. Honestly I don't really feel smart at all as well, since I forget stuff so easily. But nonetheless, this is a journey, and sadly we're bound to face some hardships. If we bounce back quickly, review our mistakes, and work on it, I'm sure you'll see some improvements! As a VCE student, I don't really know what your assignment was, but I learnt that the quality of practice is fundamental, even more than the quantity of practice. So for next time, I suggest scrutinising the feedback you received from your drafts and hone those skills.
I'm really sorry if my advice was a bit bad, but I just wanted to motivate you that it's not over yet, and there's still a big adventure ahead of you! I hope you bounce back quickly and get the marks you want! We're all in it together 🙂