My greatest epiphany in regards to social media was the discovery of the BLOCK / IGNORE button. In the case of this site, I was experiencing the same thing you describe. Over the years it was the same dribble from the same posters with never a constructive, positive or even enlightening comment. So WHY would I allow those people in to my world?
I equate it to living in a neighborhood. Say you live in a neighborhood everyone gets along, is cordial, maintains their home, even lends a hand when needed. Then there is that ONE guy...doesn't mow his lawn, has cars up on blocks in the yard, shouts at the kids walking down the sidewalk and keeps every baseball that lands on his yard! Well the BLOCK / IGNORE button not only shuts them up, but actually REMOVES them from your world. It's like a cyber "dome of silence" that surrounds them from being seen or heard in your world!
Often times I'll scroll through comments and see them numbered #32, 35, 38, 39, etc. and know that the idiot meter is going off the charts again as those ignored comments of #33, 34, 36 & 37 are the same dribble they posted 2, 5 or 10 years ago. So do yourself a favor. Become proficient at the use of the "ignore" function on here and experience life the way it should be, troll free!