Take my advice, if youre gonna use the party finder, accept that you will most likely lose, and add the good players and make a team with them eventually. Im shy and didnt do that, so I lost SO MANY ranks from playing with randoms. And I know it sounds like bullshit but I promise to you I was MVP in most of those games. A single bad player can entirely fuck over everyone, unless youre godlike at the game and can carry high havoc somehow. The RNG on those missions can be insane. Even then you should probably just find a LFG group. I only managed to reach 40 by playing on discord LFGs and they are usually people that could match my scoreboard. Im convinced most of the good players arent pubbing