What you've experienced is the reason why I stopped doing kings fall. I've only 4 or so completions, I played it many times without finishing so I could learn all parts of the raid, I know exactly what to do and I can do my part easily. However when two or three members of the team suck badly it becomes incredibly annoying. Seeing as I don't have loads of time to game I don't want to be spending 4+ hours on a raid, that's between finding people to join, then finding replacements for the quitters then the countless wipes as the one guy that can't jump is torn at sisters. Kf is the worst raid imo. And I'm glad poe is coming back because I'll only need 1 random to join me and my buddy.