for testing, I've always sampled the buds before they were ready. some plants are good right away, while others need at least 20/30 days of curing to be smokeable. in my opinion, you messed up something in the drying process, probably too fast, and the storage took away the last flavors. check how dry it is; if when you crush it, it turns almost to powder, it's a wrong drying process or the storage wasn't done in a properly sealed jar.