Sort-of memes that are cracking you up at the moment

Machiavellian used as an adjective has rarely, if ever, been used to convey that the subject is literally a prince or has a royal title

That's not the point. The adjective, as commonly used, means "behaving as Machiavelli's Prince would". As a construction, though, it's natural meaning would seem to be "behaving as Machiavelli did"

you might be using Machiavellian wrong

Nah, I use it the same way everybody else does, despite feeling weird about it.
I know what people will take from that usage, and to the extent that I want to convey that I will follow the herd. In contradistinction to Humpty Dumpty, I accept that words mean what you want them to mean, not what I want them to mean 🙂