Here is my take. Kami is most popular so they have sheer numbers and mostly sold to APA players who don't know anything. BUT......truth is most of the hate comes from folks in my category. Older folks, like me, who are still bitter that we were never pros for whatever reason. Stuck in the world of maple shafts, single layer tips, baby powder and chalk towers, cloth with tumbleweeds on it, house chalk and smoke. Pissed that things have changed without our permission. That things have passed us by and the new is better than our old way.
So yes. Kamui sucks. Even though I've never owned a cue with a Kamui tip on it..........