Maybe he didn't actually mute you.. Maybe he was just suggesting another word for you to use to describe your team's damage output? Instead of "our damage output is not good" you could say "our damage output is muted" with muted here meaning "not expressed strongly or openly." I remember back in my freshman English class in high school, "good" was one of the words we weren't allowed to use in our papers. We had to come up with more descriptive ways to say it. He might have been trying to broaden your vocabulary, just like my English teacher. I know we can play this game as an escape from reality, but it's always good to try to learn something new every day. It's like Brooke Griffin says "The Most Successful people learn something new each day. Knowledge is Endless and Personal Growth is Continuous. Always Seek More." I don't know who Brooke Griffin is, or why she randomly capitalized words in her quote. A quick Google search suggests she might be a lacrosse player? I'm not sure though. Maybe I'll find out and then use this as what I've learned today.