My comparison was not based in Rocko's quality, but rather its age and popularity - Rocko was a cult show that spawned very little merchandise during its time on air, and is over 30 years old, it is naturally entering the phase of a non-major corporate intellectual property's lifespan where the nostalgia's dried up and now it's just a 60+ year dormancy until the copyright lapses, so it's hard to find others invested in it and merch/crossover appearances are going to slow down - the same fate has already set in for a majority of Hanna-Barbera's IPs - Magilla Gorilla was not forgotten for being a "bad show", it was forgotten because it's old and not a ubiquitous piece of pop culture like Scoob/Flintstones/e.t.c. - just like how nobody really talks about the old Jay Ward cartoons anymore, which are universally renowned as clever and working on two levels, making them fit neatly into the silly idea of "objective quality". Or even look at it in reverse, He-Man is over 40 years old and even acknowledged by its fans as being poorly animated and written, but remains relevant today because of its ubiquity. Original Cartoon Network shows haven't reached this point yet (only one 90s CN show failed to reach the 2000s, and Cartoon Cartoons only even started to exist in the latter half of the decade) but they will eventually as the majority of 2000s kids outgrow nostalgia, just like Hanna-Barbera's toons, it says nothing about a work's quality if can't still be mainstream 3+ decades later, and more boring business things - marketing during the original run, modern day licensing and who it targets, accessiblity on modern platforms, how reboots have been handled, so on.