People who are very socially awkward are proportionately rarer. However in the grand scheme of things they're not exactly uncommon either. Let's say someone has a level of social difficulties that puts them among the 1% most awkward individuals. If that person lives in a city of 400,000 that means there are still 4000 people in their area alone that are going through the same thing. That's millions and millions of other people on their continent. They may be spread out, but they're everywhere. They're having the same thoughts and worries and insecurities, and feeling confused and frustrated by identical situations. Even the thoughts and behaviors you have that you suspect may be totally esoteric and unique to you are probably shared to many, many others.