In the continuing buckwheat sprout saga...I actually ground them in my new juicer
and mixed in carrot pulp (from the juice, can't waste any part of my veggies!) and am now making crackers in the dehydrator!!
This was a spectacular failure. Tasted like a cross between sawdust and dirt.
I ALWAYS taste the "batter" before dehydrating crackers. I will assume that you did not season the crackers with salt, lemon, raw shoyu, ect. Just like wheat flour and carrots wouldn't taste good as a cracker, neither will plain buckwheat and carrot without some seasoning.
Additionally, I haven't made crackers out of ground buckwheat groats as a base but I've used other grains. I still usually add some soaked flax seeds. Perhaps you should try different tried-n-true recipes before making some up on your own? Just an idea. I truly understand how frustrating it is to put that much time into a recipe that doesn't work out in the end!