I am playing healers for more than 10 years in various games but i am fresh in FFXIV and will be learning it for some time. I still am sprout

I was running my daily rulette 50/60 on Monday. Amdapor Keep popped.Tank started sprinting ahead. He was picking one group after another. When he stopped he had several groups on him (6 or 7) and few started attacking DPS.

We all died and after respawn chat was:

Tank:?
Tank:?
Me:?
Tank:Why you didnt keep us alive.
Me: It was to big pull for me.

(I can manage to heal tank with double or even triplepull but this was simply to much for me)

Usually i would expect something like: Okay i will pull less / It wasnt that big but you did .... wrong and it will be better doing ...

But no it was : Enjoy your little pulls. Im off.

We got new tank and finished dung with ease (just one death - tank fell over the edge from Demon Wall push)

I meet toxic people here and there but they allways make my day darker.