How to completely disable chat ingame?

Hello i just get too tilted because of the chat (mostly my own team) and lose a lot of games because of it.

Is there a way to automaticly write /mute all everygame or to disable chat AND the sound of the chat?
I already know the trick to hide the chatbox but then i still hear the sound.

no there is no way u just can type /mute all

You can move the chat outside of your screen.

Adjust the chat size, move it away.
Or, make an external Overlay that covers your chat.