What you're missing is that up until relatively recently, folks were still holding out hope that Reddit could remain a place that was enjoyable to interact with regularly. It's only the last 5 years that it has completely degraded into an obnoxious hellscape that you occasionally have to pinch your nose and deal with to extract some information that is unfortunately buried there. Facebook, on the other hand, degraded into a hellscape a long, long time ago. The facebook wounds have healed, whereas the reddit wounds are fresh. Plus, people liked using Reddit a lot more than they ever liked Facebook at their respective peaks. You're seeing people coping with a deeper and more recent loss.