Hello! new here, just wanted to say I have the same stuff you have. I literally do the same damn thing you do, I don't know why I just do and I am also always angry at literally everything. I personally think it's all the built up disrespect we get for not being normal. I also start mimicking accents when I talk with someone has an accent as well as randomly. They think I'm making fun of them, totally not doing it on purpose just happens and I realize it like 5 minutes in or until they say something. I've made up so many fantasy worlds it's not even funny. It's because life itself is not somewhere I want to be, and yes I also do the pew pew sounds and make it sound like other people are there. Literally last night I reenacted world war II in the kitchen for like 30 minutes