It seems clear to me that he hardly knew this Chelsea squad and its recent past.
He entered the middle of the season, certainly with requirements such as fitting Havertz and Ziyech in the team, in addition to having to enter the top4 in a league that is new to him.
He will have many excuses, but a good coach is the one who takes the best advantage of the squad he has, either tactically or in the choice of players. And it has to be clear, Havertz and Ziyech are a long way from being able to start in this team, they need to be worked out in the gym and psychologically and he needs to make a point there.
To play with a defense of 3 CB´s and the choice of players he has made does not make sense, football has been poor to be friendly, offensively the team is a desert of ideas.
Once again, Giroud, who is the team's best striker and goal guarantee, has been devalued.
The best Chelsea team today would be:
Mendy; James, Thiago, Rudiger, Chilwell; Kante, Kovacic, Mount; Pulisic / Werner, Giroud, Hudson-Odoi