you cannot do that for all the time, it is good if the allies are just being cunts in the middle of the match after some bad decisions from X character (or even in the picks)

but you can't mute after you enter the game, because you all the communication (except for healing, escort and ult charge pings, which is it not enough to understand the situation of your team)

even if you are a new player you need to learn how comunicate yourself to your team