I am frustrated. This has been my biggest failure in almost 40 years of fish keeping. I am also a realist. And the reality here is that 90% of all Betta Splendens will spend their entire lives in a cup. I used to take offense to it and even felt sorry for the fish, but not any more. The fish themselves dictate this practice and I was just forced (reality slapped) to accept the fact, that's all.
I am a life-long aquarist, and keeping Bettas just doesn't fit neatly under this title. Keeping Bettas is actually a hobby of it's own, or at best it is a highly specialized niche in the aquarium hobby. And it isn't for everyone, me included.
Thanks, everyone, for all the advice and comments, but I didn't do this to have my own private Armageddon. I respectfully admit defeat before any fish dies and will avoid keeping any more Betta Splendens. I enjoy watching fish co-exist and react to each other in mostly positive ways, not tear each other limb from limb.
Hope to communicate with some of you again under other headings on threads where I can relate some of my many successes.
38 years in the hobby and counting