It is clear that whoever wrote the article has perhaps the poorest understanding of all! A true introvert is someone who doesn't feel sad from being alone (and hence who would not self-report as feeling "lonely"), most likely because they have such high self-esteem that they regard most people not worth interacting with. The article, however, conflates "introversion" with loneliness and low-self-esteem, as if the only reason why anyone would be introverted is because they can't socialize despite wanting to (e.g. incels), completely ignoring the existence of those (e.g. us) who are disgusted by the idea of socializing with barbarians.