The question remains that if its so easy but you're seeing repeated wipes.... why are you getting hit by easily dodged mechanics? Only one person has to pass and to fail you have to get hit twice. No explanation is needed for don't stand in AoE markers and I wouldn't have stopped to explain that either if I were that tank.
I'd rather have the ability to carry 3 other people through content than a normal fight where if the healer or the tank goes down early to easily dodged mechanics then it's a guaranteed wipe no matter how good you are.