Making the double sub was to get reaction, to give a shock to the team like Inzaghi told us. The root issue of that is he himself hasn't done his work properly by preparing the team correctly to the match so that he had to try to "fix" it during the match, already in the first half.
IMO he took the ownership of all this so at least that's good.
Let's hope he can find a way to get out of this mess, because the team looks fucking terrible on the pitch. They are not fighting for loose balls, there are no urgency, no inpsiration.