I feel like it’s mostly both ends of the spectrum. Those that underperform and those that are really good with the fight already. I do feel like tanks that underperform dip out quicker than most. It comes down to patience and a lot of people don’t have it. Either people want an easy carry or people want everyone else to be on their level ... even though it’s new content in this case. Players that put 12+ hours a day in need to realize that isn’t the norm and people don’t have that much time to learn a fight. People that don’t try to learn they can’t be carried through content.
I think there should be more of a punishment for rage quitting.
On a side note, I thought this trial was difficult to learn but super fun once I found a group that was patient enough. It’s very unforgiving for rezzes because there are a ton of large AoEs that you can’t avoid if the timing is off.