I just did the first heroic run of the raid (finally found people to actually raid with on heroic.) Looking through my logs my scores are terrible, I see some shortcomings with my cooldown usage and management, but I wouldn't think it would make me worse than 90% of people logging heroic undermine, what am I doing THAT incorrectly?
https://www.warcraftlogs.com/character/id/21829965?difficulty=4