Here's why:
* Bugs and glitches: The game was riddled with bugs, glitches, and crashes, making it nearly unplayable at times.
* Poor level design: Many levels felt uninspired and repetitive, with frustrating camera angles and awkward layouts.
* Clunky controls: Sonic's movement felt stiff and unresponsive, making him difficult to control.
* Uninspired story: The story was convoluted and poorly written, featuring cringe-worthy dialogue and a lackluster plot.
* Poor performance: The game ran poorly on all platforms, with framerate drops and stuttering.
While some fans might have personal preferences, Sonic the Hedgehog (2006) is generally recognized for its numerous flaws and is a prime example of how a game can fail on multiple levels.
It's worth noting that other games like Sonic Boom: Rise of Lyric and Sonic the Hedgehog (2017) also received significant criticism and are often considered among the worst.