I'm reminded of the late 1950s/early 1960s. "I won't buy a car with tail fins!"
Yeah, some people can hate a design element so much that they're willing to boycott a manufacturer/manufacturers until the design changes. However, they're nearly always a small portion of the buying public. Chances are that when the design aesthetic finally does move on, it's not because the manufacturer needs to regain the boycotter's business. Aesthetics change in order to signal "new product."
Now, in the case of tail fins, there was zero functional need - it was purely ornamental/"new product." Rocketry and the Space Race were very hot in pop culture. Ironically, those big tail fins reflected the late 1940s/1950s science fiction aesthetic. When people learned that real space rockets had much smaller fins and far fewer curves...
The Notch gets into more fundamental design considerations - it signals and accommodates functional hardware changes. The question for designers (and consumers) is, to what degree should those changes be expressed/signaled in design?
The Notch carries more symbolism and function than the typical design change, as it's tied to several major changes - elimination of the Home button, elimination of Touch ID, introduction of Face ID, and introduction of the edge-to-edge (or more accurately, corner-to-corner) display. And note that there was also controversy over Apple including Touch ID in the Home button rather than placing it elsewhere (though not nearly as much). The corner radius (vs. squared-off) display has also been controversial, but to a far lesser degree.
That's a lot of change in one package. As tiresome as some debates become, we're not likely to be rid of this one until the next major functional change.