Whats wrong with my fury warrior in world of warcraft?

Hello, please help me, im desperate! to get high dps, i have done everything i don’t know what i am doing wrong,
i just cant get past 30k dps and i have an item lvl of 485, which i find ridiculous, i really hate my character, im ALWAYS the lowest dps on LFR, raids, dungs, omg i just completely suck!here is my character!

And my rotations are
but TBH i dont understand them well, can someone explain when to use them??
Rankings are based on the following priorities:
1)  Berserker Rage if not already enraged
2)  Bloodthirst
3)  Colossus Smash
4)  Execute if boss < 20% health
5)  Raging Blow
6)  Wild Strike (On  Bloodsurge Proc)
7)  Heroic Strike only as a rage dump when rage above 80
Cooldown Priorities:
1)  Heroic Leap when  Colossus Smash debuff up
2)  Recklessness
3)  Dragon Roar
4)  Battle Shout only when 70 rage or less
5)  Heroic Throw
please guys help me.The help will get free wow gold.

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