There is a reason over the years I have see players get out of the party healing job (Cleric mostly) and go for a more self healing Divine type casted build (Druid/Fav Soul) or leave Divines altogether .
When a player tends to mess up it is rarely noticed unless you are the party healer. Now you will notice out there there are less Cleric types cause they tend to be type casted in a party healing role which is the way they are built, but players forget that they don't have to be. It is a free game. I think it is expected for a reason, but it is rarely appreciated. It is the reason LFMs waiting for party healers are up for a long time.
There are plenty of bad players. It is just that you only notice the bad Clerics. Clerics/party healers are the goaltenders like in hockey. Everyone screams and yells when a goal is scored by the other players on the team. They pat themselves on the back. But if the goal tender sucks or is having a bad day the game is still lost.
You will see all the hockey players go up to the goaltender after the game win or lose to show support and thanks.
Unfortunately that does not happen to Clerics/Party healers in DDO.
You are ungrateful kids most of the time.
It is why there are less Clerics than there use to be. I have seen many Clerics come and go over the years. Even the ones that liked to mostly just be in a heal role.