Most of the time, it feels like people are just saying "yall are just mad cause I'm right" but using different words because its often obvious why: an unpopular opinion or believed to be objectively false. These comments already have plenty of replies explaining why their comment is bad in some way. The only cases where there should be confusion about why is is if you are posting in a community that gets the same comments all the time and so its spam and you don't know it, or you said something that is being misinterpreted but for whatever reason you are unable to tell why and you haven't gotten any replies already (but for some reason are paying close attention to your internet points).