I completely understand. I never found a flavor that made me want to purchase it a second time. I did try four of the flavors over the course of a few months. (We get our Mag Citrate there so we were in every 6-8 weeks).I bought six bottles of that prior to surgery and managed to choke down two before being completely revolted by them. They taste and smell like beef tallow to me. The other four are collecting dust on my shelf.
Keep trying things. I know Costco is very willing to take products back, even opened.