I wanted to complete the weekly(?) mission with the sniper rifle, so I joined a game on medium difficulty, just to get the kills.
There were 2 dudes in there already in mission and as soon as I landed one of them made clear that "we are not extracting until we got all the samples. It's all about the samples!". I let him know I understood and asked if we should split up, but he said we should stick together and follow his lead.
He was very talkative and actually pretty nice, complementing us and giving us advice (whether we wanted it or not).
But he was taking his sweet as time and when we finally found all the samples he realized we only had 3 minutes left in the mission and a long walk to the extract. With 1 minute left on the extract timer 2 of us got killed and he now was alone, completely surrounded and running around a building with 15 robots on his ass, yelling "how did this happen? It was all for nothing. Everything we did, for nothing!!".
I think he actually rage quit soon after and I laughed my ass off. Moments like this is why I play this game, I don't care that much about progressing my character, I want the drama.