Maybe. But even those times I usually get a few knockout cups from a bag. I appreciate that some coffees have less "tolerance" and have to be brewed just-so to be excellent. The most unique ones tend to be that way.
to me it's just the matter of maximizing what i can get out of the natural variations between each bag and each cup within a bag as it rests. im not messing around with my technique much beyond what i know works well enough, at the best of times, to produce A+ cups of coffee.
cold brew does extract differently. but yes, it's also generally old even when fresh. the stronger i brew it the less stale it tastes to me, so I wind up with a very high brewing ratio of something like 6:1 or less. and i like to drink it neat :-)
was the mayo removed from the jar? instructions unclear 😉