This seems to be true for me also, including my mother who tried it just as I did. I believe that cannabis truly is an amazing plant that has tons of medical benefits, but as for straight CBD being useful for my pain or anxiety, it didn't seem to do anything at all.
I tried different brands, doses, and ROA's.
Even dabbing a half gram of CBD isolate in one sitting had no effect.. I also tried a well known extract company's "CBD sap" which didn't do anything for me either.
The strange thing is it seems to work well for my dog because it does seem to help with her hip dysplasia... I still give it to her.
*~Natural~* Medical Marijuana Patient