It might be because of the intense storylines or creepy characters.
The canonicity of Sonic the Comic is a bit ambiguous. It might be considered canon within certain contexts or storylines, but it's not a straightforward yes or no. Different developers and storylines within the Sonic universe handle it differently.
Maybe it's the art style that some people don't like. Different strokes for different folks, you know?
Maybe it lost popularity and didn't sell well, so they stopped making it.
Maybe it's the dark themes or unexpected plot twists that make them scary.
Maybe it's because the plot was confusing and didn't engage readers well.
It could be that the Sonic Archie comic didn't live up to fans' hopes. Maybe the writing wasn't engaging enough, or there were too many changes from the original Sonic concept that people loved.
Maybe it had poor storylines or inconsistent character development. That could be a reason for it being seen as horrible.
The Sonic Archie comic could be seen as bad for various reasons. Sometimes the character development wasn't up to par, or the plotlines became too convoluted and hard to follow. Also, changes in the creative team might have affected the quality.
It's often seen as unprofessional and can give off a childish or amateurish vibe, which might make it seem scary in certain contexts.
It's full of creepy and mysterious elements. There are probably spooky scenes and maybe some unexpected plot twists.