Is it possible you were standing in red circles? A little dodging goes a long way. Taking more hits than necessary can cause a healer to have to cure you a whole lot and then you're going to lose agro. Shouting at you is not very helpful, but I can understand the frustration as I've been through this numerous times. What ends up happening is that there's no time to tell someone to move out of the way of the AOE because you're too busy SMASHING BUTTONS trying to keep them alive. The frustration builds and builds until all rational thought is gone and you're just done. The 'stopped curing entirely' might have been an attempt to let you build more hate, but then you dropped dead from not taking a step to the left. This has happened to me several times. Then, the healer looks like a bad person, when all they were doing was trying to do their job properly and stop causing agro problems.