I am with everyone else here that says "Let the maker know!" There could be a lot of reasons why this happened, and Lord knows none of us are perfect and we all make mistakes sometimes. But regardless of what the reasons are, I bet the maker wants you to be happy with the knife and would want to know about this.
I received a custom knife several months ago and I was very, very disappointed with the fit and finish. There were several issues, and I knew they were substantial problems and I was not just being "super-picky."
I let the maker know about the issues with the knife, and he thanked me profusely for telling him. Turns out he was dealing with some issues when he made my knife, and that knife really should not have gone out the way it did. And in my case it was a lot more than just not being sharp. I knew that this knife had issues that were beyond repair and that to address these issues, he was going to have to scrap this knife and start over from scratch. Still, when the maker received the knife he was very apologetic and put me right at the top of the list to make another knife. Within a few months, he sent me another knife. The new knife was soooooooooo much better than the original. I was and am happy. And from everything the maker told me, he is happy to have had the chance to fix something that went wrong and turn an unsatisfied customer into a happy one. It was a good thing for everyone all around that I contacted the maker about the issues I had with his knife, and gave him an opportunity to make it right.
I really think you owe it to the maker and to yourself to politely let him know why you are not happy, and to offer him an opportunity to address it.
Good luck!