Mute all feature

Recently I was given a temporary suspension that will be lifted tomorrow, the suspension was for using a form of hate speech, while i didn't mean it in any way of toxicity mainly just joking like oh you bugger, riot still got me for it, and these past 2 weeks have had a bit of a learning curve for me, though i don't mean to be toxic my personality just comes off as toxic

LONG STORY SHORT. I find it hard to control my attitude and not flame when my team is being stupid, please to prevent more permanent and temporary bans can Riot please implement a mute all feature

i know i can type it at the start of each match but its not something i think about at the start of each match, and it only takes 2 seconds for someone to get the better of you, You can say. If it takes 2 seconds for you to get mad you shouldnt play but that's stupid, it shouldnt take 2 seconds for someone to be an ass to make you flame, im not easily offended but i like trash talk, and if that option is taken away from me then that would be fantastic, it would prevent many people from flaming at their team

I am a player of 5-6 years and ive already decided if my account gets perma banned im not returning, ive invested time and money into this account and am not willing to restart, It would be awesome if this feature could be implemented, they already have a allchat mute but can we put in a mute all feature so i dont have to mute my team? I enjoy playing league, and i dont want someone else ruining it for me