I called jungle first, and 3/5 of the team agreed. Then that one doesn't talk and autolocks for jung

Guys, I'm getting sick of the horseshit this game pumps out consistently. I'm new to league, been on for a little over a month. It took my friends forever to convince me to play, and when I finally did, I ended up loving but hating the game. Today alone (but really the past week) I've encountered countless can't be arsed, egotistical, inconsiderate pricks in the pre-game lobby. My latest example: entered a game with intention to play Jax jungle. I call it first and I entered the room first. Everyone else picks their role, and this one shyvana decides that even though she didnt get call, she can jung too. So she ends up locking shyv with smite. Game starts, I ask for leash, and she not only steals gromp, but exclaims, "WTF are you doing?". The rest of the team doesn't comment on the issue of two junglers. So I'm forced to go top now, and that lane is already a loss. So I left the goddamn game. Similar has happened to me in the 3 games I've played today, and I'm sick of it. My friends are finding it harder and harder to convince me to keep playing this toxic, trash-filled game.