I don't think the bad is equal to the amount of good produced, Red.
Considering over the two periods we've seen:
Faith No More, Mr. Bungle, Any other Patton project, Tool, Radiohead, Opeth, The Smashing Pumpkins, Rush, The Cure, Pre-With Teeth NIN, Pre-eMOTIVe APC, Emperor, Mastodon etc etc.
Those were just off the dome. I would continue but I just realised it'd be pointless. Actually far too much to recall.
80s had some incredible Rock music, some of the best ever.
-AC