Don't let anyone else dictate to you how "efficiently" you need to play. If you're not comfortable with fast paced, large-pull runs then don't stress over going out of your way to protect or please those who deliberately choose to slap you in your face and tell you your standard of tanking isn't good enough for them.

As a Tank and DPS, I favour large pulls, but I would never hold it against any Tank who didn't feel comfortable with that and I'd expect it to be the most basic of common courtesy for ANYONE to behave the same way. If anyone tries to give you lip for not being a "good tank" then kindly point out that, if you are a bad tank, then they are a worse DPS for deliberately disrupting your personal method and being incapable of learning how to adapt.