Not sure if anyone knows why this still isn't an option. I've played multiple games where I got harassed/berated as soon as I use voice chat, which makes the gaming experience pretty crappy and usually leads to a loss. Then there are those...

VALORANT - best walkout

Valorant is supposedly very strict about smurfing and boosting etc. While I have seen riot devs act against smurfing with various updates, I have noticed that a lot of streamers occasionally play ranked with a smurfing pro. Just yesterday...