The majority of downvoted comments are ones that are spammy or provide incorrect information anyway. Ever since this game got a subforum, most of the useful information is now posted in the forum instead, so the comments section is not as useful anymore and is pretty much just a place to provide general feedback about the game now. And since this "feedback" thing is usually very controversial, it's not surprising that many comments are downvoted.
 "pDecathlon - the hardest physics game"){kind=icon}
 "Achievement Unlocked"){kind=icon}
 "Anti-Idle: The Game"){kind=icon}
The majority of downvoted comments are ones that are spammy or provide incorrect information anyway. Ever since this game got a subforum, most of the useful information is now posted in the forum instead, so the comments section is not as useful anymore and is pretty much just a place to provide general feedback about the game now. And since this "feedback" thing is usually very controversial, it's not surprising that many comments are downvoted.