Some of them are retail players thinking healers can make up for their mistakes. Others are from WOTLK that believe their damage/tanking ability are still WOTLK-esque. This is exactly the same kind of behavior we all saw when the original Cataclysm rolled out.
It took until MOP for everyone to realize WOTLK was over along with the days of easy of heroics. The fact that we already had Alpha, Beta, and Gamma Heroics and these baddies still don’t know how to dodge, mitigate, move, or pull smaller groups more frequently just shows history was always going to repeat itself. We’ll see something similar when MOP Classic rolls out as well as when WOD Classic does too.
We all saw how the vote to kick went in original WOTLK and Blizzard still didn’t address those flaws the second time around with WOTLK Classic.
Let’s hope Microsoft screws the Blizzard dev management teams once and for all. It’s better to have Microsoft’s terrible security history compared to Blizzard’s absolutely lack of dev integrity. Their dev management couldn’t prioritize a JIRA ticket even if it meant higher salaries for themselves.