You need to get rid of the pve max damage mind set and get some sustain. You will learn with time.
Actually, I ran a bit with DW- but I didn't enjoy it. I stuck with my original 1HS build. You can do higher damage with lower sustain if you have 1HS. The heavy armor helps rebuild your sustain and the blocking mitigation allows for you to put more points into damage.
Want to enjoy the game more? Try both PvP (crybabies) and PvE (carebears). You'll get a better perspective on everyone's opinion.