I think it has to do with the problems with this season. Last season I was finishing most wildcard matches with between 10 and 13 kills with around 2 to 3k damage. This season I get 0 kills each match and am lucky if I get an assist. Each match my shots are doing almost no damage even when they hit, or all 3 of us are getting beamed by cheaters.
I get your frustration, and I've been feeling it this season too, but I've been trying to be understanding of my teammates because there are definitely problems in the game right now. I'm not sure what is causing all of this, but with what you are saying, and what I see from others, even Imperial Hal did a video on the hit reg issues and aim assist, I would kinda go easy on them until the game is fixed. Even the survey they sent out recently had questions about the hit reg issue, and it sounds like your teammates are facing the same problem.