"Hele interviewet er da vinklet Astralis negativt, der coach der siger de er brændt ud"

That was a bad joke about the Astralis-players that went on sick leave for being burnt out. NiP-players referred to device's very strong colors on his screen (and possible high brightness ?). And that the monitor settings must have been the reason since the NiP-players would also get their eyes burnt if they used the same settings (i.e. get burnt out). More or less that's what was said.

I took the things device said as others have already mentioned, trying to downplay himself a bit. It was mentioned that especially ztr might get star struck so device probably don't want to come off as better than his new team, but rather as being one of the guys.