What I cannot comprehend is his game management.
While yes his tactics were also shocking at least (usually) you could see what he had envisioned the players doing even if it never worked out that way. But I cannot in my whole life think of a manager who was so utterly inept at reading the flow of a game and making changes to impact it in the desired fashion.
The Stoke game was a masterclass, losing by 1 goal with 15 mins to play and he brings on a 3rd centre half and a defensive midfielder while leaving on an attacking player who has zero goals and zero assists all season.