I think what impressed me most was his first Chelsea season. Under a transfer embargo he used the youth and make Mount, James and Abraham to England internationals. 4th in the league, FA-Cup-final, CL out vs a unbeatable Bayern side.
Struggled in the 2nd Season after they could spent a fortune. BUT even Tuchel is now struggling. I´m very sure he would give us a rebuilding to a football side not an laughing stock.
Remember the Chelsea game before the Covid outbreak? We´re getting batterd by them and it was one of Ancelottis heaviest defeats in his career.