You keep throwing around these vague assertions of dissatisfaction. Without knowing how the poll was worded, what specifically they were asking, I think you're likely making a tempest in a teapot. Are some people unhappy? Obviously. Some people would complain if someone handed them $100 because they weren't handed $1,000.
To make the obvious historical comparison, there were a lot of people unhappy with 3e. Remember? Of course ... "a lot" really depends on how you define "a lot." Was it "the community?" Was it "many people?" Was it "some?"
Regardless, some percentage of people didn't like the direction of 3e. They preferred the TSR-style games. So what did they do? They got together and created the retroclones and OSR movement. Because there was some interest in it!
As much interest as there was for 3e/PF? Nope.
As much interest as there was for 4e? Nope.
As much interest as there was for 5e? HA HA! Not even close.
It was, and will always remain, a tiny percentage of the market. Because those preferences, while strong, are not universal. And that's okay! But while that's a small community, it's also thriving. And it's done a lot better for its participants than if they had spent the last twenty years expecting WoTC to reverse course and suddenly decide that the new version of D&D would incorporate all of that TSR goodness that they were craving.