In sum, I felt helpless and defenseless against his skills.
With a whole month under your belt, you are "helpless and defenseless" against everyone's
skills. This has nothing to do with Boxing vs Aikido; it has to do with a total beginner in one art meeting a very experienced practitioner of another art. What, pray tell, did you expect? Why don't you train a while seriously before you start messing about with cross training? With just a month on the mat you don't even know enough to know what questions to ask... you can only come up with erroneous notions at this point.