Dark knights have spent years waiting for adjustments while warriors get them in a patch or 2. It's pretty clear that we are abandoned and ignored. Anything we get just gets taken away and given to the other tanks and for any skill we gain that the other tanks had they get another to make up for it so nothing changes.
If you want to call it hostile, entitled, toxic or whatever go ahead but I don't think it's unjustified when dark knights have silently waited for changes for so long only to be given abilities the other tanks already do better. At that point pointing out problems is the natural backlash to what has happened in the years since dark knight was released.