once every week this kind of topic pop out and yes people are getting tired of it

What can you do? To be honest, nothing. I've seen my share of lazy healer and trust me, in the future you shrug it off because it become normal Routine later on, thankfully the game is designed to be more on casual playground so the job still done despite their lazy work.

Seriously, did they heal? Nobody die? Finish the dungeon in "okayish" time? If yes then just go on your merry way, thing could get worse sometimes, i see lazy healer BUT still doing their "core" role which is heal, and i see dead lazy healer who didnt even do their core job properly.