Unplayable Game Bug

i think its a game bug at least, all my chars in icecrown realm has low damage. like items only giving me stamina and nothing else.
my 5.2k frost dk doing 500 as melee, and dots are around 50 to 60
things I have tried:
tried to train if my skills are low level
tried to relog and restart the game namy times
i died, and walked to corpse, nothing changed
i died, talked to the angel and got a ress sickness, waited it out, repair the items and the same.
i also deleted all my addons

Here are the pics with and without the weapons, and my attack power.
https://ibb.co/bMOrVR
https://ibb.co/iWAujm

game is literally unplayable, i made an in-game ticket, havent got a response in 25 hours(lol)
made an another bug tracker ticket, nope.
made a support ticket, been 12 hours, no response
forum is my last resort

done some testing, all my chars across the icecrown realm does base damage regardless of the items they equipped.
literally the damage what is read on the tooltip

video added:
https://www.youtube.com/watch?v=jMtY...ature=youtu.be

i have deleted the addon but got 5.2gs and all str giving items


this is my armory: http://armory.warmane.com/character/...ecrown/summary
look at the damn melee damage..

if only warmane had some people who take care bug reports

Its not a bug. You are using inappropriate gear for the occasion, in this case, Tank gear. Protection spec exists so you can resist more damage while others deal damage to the bosses. If a Tank character is dealing more damage than the overall dps, its one of the two: The gear is much lower than the Tank player or the dps is faking presence.

To explain it in an easier way, you shouldn't look for Stamina, but for things like Critical Strike, Armor Penetration and Haste.
Stamina and Mastery are usually for Tanks.

I'm not really into Death Knights, but you should try going Unholy instead of Frost, since it is full dps. If you need extra help with Death Knights try their class section here.

Is your sword skill maxed?

https://wow.curseforge.com/projects/...22879/download

yes it is max level

Maybe you are using the low ranks of spells. Check that.