Blink doesn't work properly 30% of the time.

Hello,

Like 30% of the times when im pvping (or doing other stuff) blink doesnt work properly.

Blink gets nullified by the smallest of things, the entrance to the horde base in WSG for instance :
You get screwed by the ledge infront of it most of the time if u try to blink in the entrance.

Things like this happen to me all the time.

Is blinked just really REALLY messed up or is there some trick on how to use it ?

Ps: This is directed to normal players aswell as blizzard folk incase it is just horribly broken (when a skill isn't properly doing what its supposed to be doing, warping me 20 yards ahead, its broken)