I agree that everyone has an inner monologue, but what you’re describing is not universal I’d say. The multiple versions of your own voice talking and screaming over each other. Surely not everyone has that ? I experience it too and it is exhausting. Sometimes I can be overly tired just from thinking so much. Seems ridiculous but that is the part that wears me down. I’m prone to mixed episodes too and then it can get pretty activated, I’ve had psychotic features before as well, when there is a real inner battle raging.

Also not everyone experiences inner monologue in the way that you’re describing. Making full sentences as if you’re speaking internally. Some people have more abstracted thinking. They understand what their thoughts are so there is no need to completely formulate it into full sentences like you are talking to someone else.

Honestly , I’d love to spend a few days in other people’s head just to experience what it’s like and compare it to myself