I wouldn't describe as a failing of the Coca-cola company the fact that I don't like coke. Everyone has preferences. I would describe as their utter failure the fact that the first time I enjoyed drinking a cola since age 10 was when I had an unsweetened cola-flavoured La Croix.
For the longest time I didn't understand why vending machines exist, until I went to Japan and noticed I was always within arm's reach of a refreshingly bitter tea.
I had always mentally equated that bottled drink == headache-inducing sugar rush and it necessarily had to be that way. Even when they made a sugar free drink, they just loaded it with other sweeteners.
But that was really just an optimization process gone wrong and gotten trapped in a local minimum, I guess. I hope they're starting to learn their lesson.