The problem isn't the "vocal minority" it's Apple itself. They never did anything to make the touchbar more than a gimmick. Developers don't want to spend any more time than they need to in order to get their product out the door. If you have to choose between spending time working on features that only a small percentage of users will even get, or adding features/fixing bugs that affect everyone ... which is the better use of time. The touchbar was only on some of the systems. It wasn't even something that differentiated "pro" users, because the users of the most powerful "pro" systems didn't even have access to the feature because it was never on external keyboards.
It also required dev involvement, many of the apps I use are open source apps that I'm lucky enough to even get Mac ports of, much less features specific to a small subset of the Mac hardware. Most of those open with just a blank touchbar. If there was a more straightforward way for the USER to make custom keys that are app specific, sort of like what bettertouchtool does for other input devices, then you might have something more people would find useful.
So, you ended up with a feature that annoys some users, takes more resources to build, and was never properly used by devs because they couldn't count on it being there.
It isn't complainers that killed the touchbar, it's Apple's inability to standardize it across the productline that did.
(Full disclosure - I almost never use it, as I plug in an external keyboard when at my desk, but I empathize with those that did find it useful.)