I watched 1:45 of that video. It's amazingly apparent that you not only aren't 1900+ as you stated, but you probably aren't even 1300+.
Clicking, terrible blink, and spamming of ice lance?
You should probably edit your video and say that you've never been to 1550, by the way, since you don't have the achievement
Read my sticky to get started, because you need a playstyle revamp before anything else.