Whenever you see a ladder deck in casual and you think it’s not fair, just concede on turn 1.
In this way those people will just waste their time trying to find an opponent; of course, if you play the game regardless, you are part of the problem (assuming you don’t want to play against ladder decks, if you want to there isn’t a problem to begin with).
What I fail to understand is why some people in casual play ultra aggro decks: if the game ends in 3 turns, you get few XP and you aren’t gaining anything.
Do they like to play against AFK players? I don’t understand 