Play a game of showdown for the season challenge; get stomped by a two stack but get credit for the weekly three-game challenge. Ok that's fine, leave game to orbit. Re-queue, get matched with same two-stack, get stomped, don't get credit for weekly challenge.
Come on PvP team, matchmaking is absolutely -blam!-. This is why no one wants to play. It's been years of the same -blam!-.