Its low level. You cant do full room pulls, maybe pull smaller, but tanks in general are all squishy until they are well over geared. Pop cooldowns and rotate them, and most importantly esp for tanks like has been said it sucks cause dps can get away with it more so but you really want to be as geared as possible even in low level dungeons. DRK really shouldn't be much squishier than paladins, I mean their toolkit and tank stance are fairly identical, besides the shield block and maybe an enhanced convalesence?.