I realize that it's complex and difficult, but without cause, these symptoms could be anything. People placed into the same category, with entirely different disorders, responding to entirely different treatments. Seems to me this defeats the purpose of categorization. Might as well just stick to dealing with symptoms individually, until a more comprehensive understanding of the situation can be reached.
It's been a while since I've looked up any of it. I'm only peripherally aware of recent developments. Maybe I dismiss it too hastily in my frustration. Found myself reading about Schizoid Personality Disorder again. I'd come back to that one many times, but it always felt fundamentally wrong. Ok, so I'm not sure what it feels like to be happy, per se, but I take pleasure in all sorts of things. I feel all sorts of things. Sorta.
This time though, I imagined a psychiatrist checking symptoms off of a list, upon getting to know me. I can see how they might even check every single symptom, despite my personal feeling that half of them don't apply. Communication can be misleading, and it is in part, a communication disorder. On the other hand, psychologists will often dismiss personality disorder as almost irrelevant and treat all symptoms as depression and anxiety.
The reality is that these diagnosis don't mean a whole lot, in that they neither prove anything, nor have treatment implications. It can also further threaten the sense of self, to think this explains everything, when it couldn't possibly. We're still individuals, with all sorts of other variables mucking up our lives. Still, it could help me understand why I struggle to relate to people.
In reading about it, I've often come across the sentiment that if you're "struggling to relate to people," you can't be schizoid, because a schizoid does not care. Comments to that effect. It's sometimes true. Schizoid types are less likely to care or feel loneliness, but it's a spectrum, and there are other variables involved.
I've also discovered that the very officious psychiatric people have retired the diagnosis, to combine with schizotypal and move the remainder over to avoidant. This is incredibly stupid. It's almost inverse to schizotypal, and avoidant should really be a subset of social anxiety disorder. Schizoid personality is distinct in their social disinterest, blunted affect and limited emotional range.
YouTube has lots of videos on the subject, with varying degrees of accuracy and relevance. Most people telling you what their version of schizoid looks like, and this is heavily skewed towards the type of schizoid person who'd be inclined to make YouTube videos of themselves.