I feel like the dungeon timer in adept + causes too much toxicity

Like the title states, I have been running adept dungeons for the past few days now as a tank main and the timer atleast for me has created way to much griefing and toxicity in my runs. I am not under geared.. this is from someone who has ran many Cithrels Fall runs to almost get all blue gear and upgrade at the blacksmith. Almost every run it's either 1. "Bro what are these pulls? Grab more" and when I do grab one extra pack for them we wipe and everyone DC's. 2. They just disconnect without saying anything at all except for one person telling me we are going to slow when I'm grabbing 2 to 3 groups per session. 3. On more than one occasion I have had a healer DC in the boss fight but not before saying "should of cleared faster" and DC causing us to wipe and having to give up and wasting all that time getting there.

Is it me? I always try to ask before we start the run "how many do you want me to pull" and accommodate people but it seems to never be enough. I'm always to slow or too much and we wipe and people say I'm trash.. Does anyone else run into these issues?

Sincerely, irritated tank main