ForeFlight Server Engineer interview questions

This is the worst interview I have ever had the displeasure of doing. They gave me an API assignment. I completed the assignment. The hiring manager reached out to me to say that I was missing some of the features. So I redid the assignment and I asked him if he could please list the features. He did not* reply with the list of features. My code worked. After I spent all of that time, you would think there would be at least a code review. No, they just rejected me with no feedback/code review. I honestly would recommend not* doing the take-home assignment.