Does anyone know why half the games i get into, voice chat and text chat both dont work? it literally has ruined several of my competitive games and its been like this for a while.

just hear me out, bronze elo, we are losing 5/10, our jett was 4/9, he was communicating the whole game, didn't cry or blow in the mic when he dies....on the 16th round, he said "guys I have a plan, you guys go b I'll go a alone, wait a bit...