Two thoughts:

1) Try to objectively evaluate the relative workload of your duties against those of other DPS. My guild is 6/7, and off hand, I can't think of a single fight with mechanics that work against hunters to any great extent. Shannox is a target switch if you get face raped, Beth'tilac is taunting spiders down every 8 second and dropping a frost trap once in a while (if your raid's AOE is weak), Rhyolith is lolhunterturrent, Alysrazor is an occasional interrupt which can actually *increase* your dps, Baleroc is just a bit of movement every minute or so, and Staghelm is again just a bit of movement and a retarget. In all of this, only Baleroc, Beth and Shannox have *anything* that singles out hunters, and all of their hunter hate mechanics are pretty trivial. Beth is by far the worst, and even she isn't that bad unless you're the *only* dps taunting spiders down.

2) The best way to evaluate your performance is to take a World of Logs, and then compare your shot/time ratio shot by shot to those of top end hunters. This gets weird on fights like Alysrazor, but on Beth, Staghelm, Shannox, etc. you can get a pretty good idea of where you measure up just by looking at your SPM (shots per minute). Be sure to compare yourself against a hunter with a similar rotation.

How do you find your shots per minute in world of logs?