I see feeding tops way more than bots, oddly.
Voice chat would be a nightmare, look at dota2 or overwatch. Just screaming brats to the horizon
.
Voice is opt-in via discord and such, having it forced or opt-out would make low levels and ranked a hellhole and would make it harder for anyone without a mic or an interest in listening to screaming brats communicate with their team.
And i for one dont want proof that i am playing with people a third of my age, i want to give them the benefit of doubt even when they are acting like infants that have not been fed recently.
And the person doing the worst tends to be the one who cries and blames the most - they are insecure and attack others to try and level the playing field. Silently muting them both cuts off their nuisance and crushes their worthless little ego, because nobody feeds them attention.