Agree with @MashmalloMan . Imo outside of MF (1st boss for most groups and HM), FV hm (really just the tank though), vBRP DD’s dying from lack of healing is their “fault”.
That said if you’re setup as a trial healer doing minimal damage then DD’s should be able to unslot all shields/heals for max damage and rely on healer for all healing. Otherwise, forget healer and go 3 DPS using Slimecraw/Camo hunter, self heals/shields, and take a mag for orb or have tank run it.
Some people are hard to heal for. I don't know what it is, but lately a lot of -160cp players are just potatoes. Maybe new, maybe they refuse to learn mechs, maybe just selfish greedy players. The thing that drives me absolutely nuts is the sprinting potato player. Doesn't matter what level they are. You know the one, thinks they are invincible, runs ahead of everyone and pulls a 1000 trash mobs into the boss, wipes, and the rest of the team has to deal with the mess. Recently, once the potato is spotted I vote to kick. If your so damn tough, solo the god damn thing.