The Pole followed Emery from Sevilla to Paris last year.
Krychowiak told Przeglad Sportowy: "You know, I've talked a lot with Unai Emery. The coach thought that I did not have my place in the team ... I was disappointed by Emery and I told him face to face what I thought but I will not tell you about it.
"When he said that I had not adapted to the level of the team? I understand what the coach meant, but in such a short time it's complicated to do it for a defensive midfielder. Emery told me that, in my position, I had to play like Sergio Busquets. I realized right away that I was not the right player to fulfill the expectations he had in me.
"After our relationship in Sevilla, everything that happened in Paris is even more incomprehensible to me."