Everyone knows people who are their own people, but who do not impose on others. If asked, they will tell you. If pressed, they will stand up for themselves. But they sometimes show restraint where others might take the opportunity to "count coup."
It's also possible to be your own person and stand up for yourself while being abrasive, suffering no fools, and keeping everyone around you on edge. There's also a whole spectrum in between.
If my observations about certain subscribers to individualist philosophy bothers you, I suggest that might be salient data. You have far better access to additional data than I for evaluating that.
I find Objectivism, from what I know of it, to be remarkably self-consistent. It is an admirable product of its time. Some of what Ayn Rand said needs to be modified in the face of new evidence from evolutionary biology and neuroscience. (Humans clearly do have instincts.) A sign of a healthy philosophy is its ability to incorporate such new data.