Narrow-minded mediocrity, envious of my success in my profession, calls me a Swindler.

What of that?
The same low tone of mind assails men in other professions in a similar manner--calls great writers scribblers--great generals, butchers--and so on.

It entirely depends on the point of view.

Adopting your point, I announce myself intelligibly as a Swindler.

Now return the obligation, and adopt mine.