Why are people calling it “casualbringers” now?

[ForteNightshade]

I get that, but the problem is that's not happening and the same complaints about bad players are still happening over and over again, devs read this on the forums thus try to make it so there are less bad players, so from a development standpoint what needs to be done?

Nothing.

Leave the bad stuck behind a gate until they learn how to improve. You shouldn't reward bad players too lazy to improve by gifting them an easy clear. The longer they continue to do this, the more people will whine because it works. What incentive do they have to learn when they can keep complaining and get their way?