Think about it another way - person who was publicly screwed and also gave the first major back eye to Nijisanji is flooded by people bothering her about every Niji drama since. Exponentially so now because of Selen. And Sayu gets to watch the community outpouring she never got because while she struck the first blow, Selen scored the killshot. I think there are very few people with their shit put together enough to deal with the situation she's currently in.