Nan, that's a rough go with one good taster out of so many plants.
Sometimes it is just weather conditions or soil conditions that don't make for a tasty tomato year. Good idea to keep seeds anyway for future reference if desired.
I have back burnered quite a few lines after not getting what I was looking for in a season. When space opens up, I'll likely revisit some and just grow more for that generation to try and find the unique quality that was lost.