Someone who puts some effort into finding a team has “skin in the game.” He has an investment in their success. Is less like to be disruptive or quit at the first sign of adversity. The opposite is true for random MM. The player put no effort into building the team. Has no investment in its success. So there is very little to stop him from acting up and being a jerk, or quitting the first time something doesn’t go his way. Because the game will find another group for him to play with. Which is why MM for difficult content usually fails. Badly. Just today I ran a playlist strike, didn’t see the third guy unti the boss fight. Still have no idea what what he was doing while we’re two-manning the rest. THAT is what random MM brings out and saddles you with.