Give up is my best advise. I know your frustration and decided to move "on down the road". It doesn't matter what estimating software you use (Xactimate, Simsol, Craftsman Blue Book) since they will not hear anything that doesn't fit "their pricing parameters".
If you are "GOOD" at estimating than you can "write your own" ticket in the real world. I know guys that are begging for good estimators that can use any of the above named software programs.