How do I ban maps? Also suggestion

I can’t find the ban maps option anywhere even though it says I can ban maps. I don’t have 4v4 selected if that helps.

Also there should be an option to call a stalemate. Arena, Black Forrest and team island can devolve into boring stalemates where no one can make a move and your stuck waiting for an hour.

Also I want a way to call a restart if I get an awful map or a team member leaves within the first few minutes. Nothing more frustrating than losing because you got a map designed by Satan or being 2 players down in a 4v4 giving away your elo for free.