Arrogant - INTJs are perfectly capable of carrying their confidence too far, falsely believing that they've resolved all the pertinent issues of a matter and closing themselves off to the opinions of those they believe to be intellectually inferior. Combined with their irreverence for social conventions, INTJs can be brutally insensitive in making their opinions of others all too clear.
Judgmental - INTJs tend to have complete confidence in their thought process, because rational arguments are almost by definition correct – at least in theory. In practice, emotional considerations and history are hugely influential, and a weak point for INTJs is that they brand these factors and those who embrace them as illogical, dismissing them and considering their proponents to be stuck in some baser mode of thought, making it all but impossible to be heard.
Overly analytical - A recurring theme with INTJs is their analytical prowess, but this strength can fall painfully short where logic doesn't rule – such as with human relationships. When their critical minds and sometimes neurotic level of perfectionism (often the case with Turbulent INTJs) are applied to other people, all but the steadiest of friends will likely need to make some distance, too often permanently.
Loathe highly structured environments - Blindly following precedents and rules without understanding them is distasteful to INTJs, and they disdain even more authority figures who blindly uphold those laws and rules without understanding their intent. Anyone who prefers the status quo for its own sake, or who values stability and safety over self-determination, is likely to clash with INTJ personality types. Whether it's the law of the land or simple social convention, this aversion applies equally, often making life more difficult than it needs to be.
Clueless in romance - This antipathy to rules and tendency to over-analyze and be judgmental, even arrogant, all adds up to a personality type that is often clueless in dating. Having a new relationship last long enough for INTJs to apply the full force of their analysis on their potential partner's thought processes and behaviors can be challenging. Trying harder in the ways that INTJs know best can only make things worse, and it's unfortunately common for them to simply give up the search. Ironically, this is when they're at their best, and most likely to attract a partner.