No, I don't have any problems leaving disappointments behind. I've had lots of good days at golf and a few disappointments, so you never know what's around the corner. ↗
I hope that seeing the excitement of solving this problem will make young mathematicians realize that there are lots and lots of other problems in mathematics which are going to be just as challenging in the future. ↗
I tried to fit it in with some previous broad conceptual understanding of some part of mathematics that would clarify the particular problem I was thinking about. ↗