I really believe he did not expect the Apollo dev to have recorded the whole conversation, so badmouthing him would have served to create the narrative that the dev is the bad guy in this. That would have given all those people ammunition who are clearly against the blackout, against the anger of the destruction of third-party apps and against those who participate or started it. And this is what Spez hoped for: create doubt in the dev and therefore the whole blackout. So that in the end it’s a “we are not perfect, but the dev also did bad things”-situation, which sadly would work for many people.