Personal takes on downvoting, or even rules, are... arbitrary? Up/downvotes cannot be controlled, it's individual opinions vs thousands of randos that each have their own reason to up/downvote. I can't think of a solution that helps rank the "best" and hides the "worst" comments, I'm used to lower-volume forums myself where replies would be in order of posting and unthreaded. An optional "upvote" system existed on the side, but I've ignored that for a long time now.