Why is self narration so bad? How should players communicate what they’re doing?
Self narration is incessant communication of every little thing a person is doing. It is non-stop babble. it is the opposite of communication. It doesn't tell you anything worth knowing.
Here's another don't:
-DON'T tell people how to play a game. If you don't like how they're acting, don't play with them

I am specifically not telling people how to play the game, but what sort of things I have observed that can ruin multiplayer play sessions. This is about discord etiquette.
Oh and all the people who behave this way have been blacklisted. Nobody will play with them.

I didn't get the sense you played with other people Bob, has something changed?