What's your current rotation? If people are complaining about that, ignore rude comments where constructive criticism should be, but by all means check if your rotation is good. If they're complaining about your gear, ignore them completely.

On BLM, I do:

-Thunder II
-Fire 3
-Fire 1 until around 500mp while using Firestarter and Thunder 3 for Thundercloud
-Blizzard 3
-Reapply THunder if needed, rinse and repeat

My Burst Rotation is
-Set up like above
-Use Raging Strikes at around 1.6kmp
-Keep going
-Normal cast Flare at around 500mp
-Convert
-Swiftcast Flare
-Transpose

AoE Rotation is:
Fire 3
Fire 2
Flare when MP is low.

Hope that helped!