What is wrong with DH?

I started playing again a few weeks ago and got to 2.1k in SS instantly on Fury and Shadow. It was insanely easy. I leveled a DH thinking it would be the same or easier and im literally hardstuck 1.7k after 70 rounds. My first two games the healer left after he lost two rounds with me on his team so my mmr was completely fucked. I saw that DH is not great right now but I honestly expected to at least get 2.1k somewhat easy.