you can if on some classes you take proper talent for that dungeon. like evokers can dispel themsleves out of practicaly almost everything - including those annoying dots in there
but this woudl require understainding the mechanics in dungeon before going into it.
This happens in 6-9 keys also which i am currently at. It is meta now when people watch streamers and think they are gods, healers are frustrated as tanks feel they needd to rush, and people leave after 2-3 wipes.
It is a toxic mess in random groups which a lot of people paly with. Timers are the worst thing in every game. It is the missions you hate in every single player game, now it is printged in to 5 man progression, ugh
It is the m+ twitch and YouTube streamer mentality + tanks are strong and think they are indestructible.
What OP described has been my experience in 70% of groups. Healer usually leaves. Or tank leaves because the group is slow. Of course. It’s a normal dungeon people see it for the first time.