80%+ of the time someone has a mic in OW I feel like I need to mute them. People don't fuckin know how to use mics, and they turn the volume all the way up on their shitty headphone mics and scream and snort and breath into them. Honestly I just find it fuckin miserable when 6 people are trying to use the mic. I'm fortunate in that I have a voice that the average OW kid thinks is manly...I can only recall one time EVER that I heard a woman talk in OW chat and she was taken seriously. That actually was a very good game with multiple mics going, but that's like 1 in 100. 1 in 1000, I don't know.
Also, ALSO, what about those OW people that ANNOUNCE THEIR FUCKIN PLAY BY PLAY CONSTANTLY THROUGH THE MIC. I don't need your life story dva.
So yes, I do use mute. Most of the time. Actually I don't play competitive that much at least partially for this reason, so...
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OK, final postscript I want to add: Taking solo queue competitive OW seriously is a path to pain and coronary complications.