I had a new one this week. I got kicked from group immediately after buying the 45 Intel WHVT.
I have said for eons, I don't care how good someone is. If they listen, try, and willing to try other things then I will help (sometimes carry) them through. But, lack of communication or effort goes all over me. It is no wonder I generally go solo. This last GE, I ran Stolen Signal with a group for the Security Wing only commendation. During it, we couldn't get enough firepower in the shock floor room so I asked if they were going to run it again because we needed longer range firepower. They said they would. (see where this is going), so I switched to ranged weapon in that room to quickly clear it (after wiping a dozen times). When the mission was over, they all left. I sent a message to the leader and he said he got all of his so wasn't going to run it again. Jerks. I matchmake for probably an hour and a half a few different times and never got a group with more than 1 person and they wouldn't respond to verbal or text chat. So, I just farmed for gear and left that one last commendation alone.