Hum i see some wrong in there

If you have a tank that spin a bit too much don't stay in the way and move too might be a dps loss but in case there is whiney just say that the tank was moving a lot when he shouldn't

You stayed alive by keeping distance Does it mean that you were out of range for your own dps ?
Then blaming someone for not doing his job when you're not doing yours is... Meeeh

Not a single cleave is more than 180 so be staying i. The back you shouldn't be hit

And as i said healing unavoidable aoe is part of any healer rotation
Like last boss of hullbreaker that Does some explosions
Most of the time a single aoe healing is enough to cover it
At most you will lose 40% of you max HP

All attack can be predicted
The pattern is always the same whatever the fight
Th only thing that can happends is... Less attack due to high damage which make phase overlap and boss skill are cancelled and not queue

...

The healer is not there to patch you up 100% of the time when you take unacessary tdamage
And IF it's the tank fault
Speak up, say it

As healer i've let tank die because they are LAZY/messy and make the fight worse
And I don't regret that