When I started getting to Level 50, tanks always gave me a hard time for not using all of my abilities. The main reason I didn't use them was because my skill setup was used for fighting enemies one on one in regular quests and guildleves. So I had no idea how to use my actual DPS skills effectively and people never told what I was doing wrong primarily because the people who harassed me the most were when I was in Brayflox's Longstop (Hard). But the damage was done and I became uncomfortable to ever go to Bray Hard again knowing who I would be dealing with would be very vicious.

Fortunately, when I learned how to use the DPS skills that were meant for use in dungeons and raids, the haters went away and I started to get a lot of commendations for my work. So give it time help those who don't know about how they can use their DPS skills to know how they can use them. Especially if you have done that DPS class before.