You definitely need some fat on there. Good to have about 1/4" on top. That could have a lot to do with it being dry . The science behind the 190-200 temp has do with the collagen . The connective tissues,collagen and fats start to break down making it tender. When they break down they melt into the muscle giving it flavor and juice. Temp is just a recommendation. Put a fork in it and twist. If it releases and doesn't twist back it's ready. I have had them come off at 185 and I have had them off at 205. As for 165, I have never tried that. Ask for an untrimmed packer cut and trim the fat yourself. If there is a dry end of the brisket we use it in beans,greens or something like that. If it tastes good it gets eaten somehow.Good luck on the next one!!