Google can't seem to decide on a direction and stick with it. Years of new features that inevitably ended up abandoned 2 versions later resulted in a constantly changing and unpredictable user experience.
It was fun while I had free time in college and enjoyed flashing ROMs, but as I got busier with life this lack of refinement pushed me away.
The RGB leds were one of my favorite features of early Android phones. I even backed a terrible Kickstarter campaign that synced those colors to an RGB wristband (this was before smartwatches were a thing).