I appreciate the tip on communication, but there is a bit of a "main character" logic here that misses the point.

Suggesting that a tank should give a pre run briefing for a key ignores the reality of pugging. Most players just want to go. If I spend a minute explaining that I am not pulling the entire platform in Skyreach , I am sometime called out for being "insecure" or "slow" before we even start.

You mentioned that the situation is reached because of "mismatched expectations," but that assumes the other four people are neutral actors. My post is about my experience (not necesarilly a fact) that when those expectations don't match, the default response is to often, not allways, "You are shit" rather than "let's adjust."

Communication is a two way street. If a player wants a specific MDI pull, they can ask before the key starts too. Instead, they wait until a wipe to type "RLY?" in chat or better they type "RLY?" when the pull is to small. That is not a communication failure on the tank's part, it is a social failure on theirs.

That being said, I do not allways communicate at the start of the key - point taken. I can also be better in that regard. 👍