I think reddit peaked around the time it started changing which subs were front page (8-10 years ago now?). One place I was very active at the time moved from being a medium size, great community to being overwhelmed by people who had no sincere interest in the topic but were happy to karma removed.
The sub became larger than ever by capitalizing on the community that built it but its value about its topic evaporated. Reddit has been making similar moves ever since. Karma-removed dominates pretty much every non-niche sub now.
*The removed that caught the filter refers to the act of getting something in exchange for performing an act eyeroll